Thursday

April 24, 2014

April 24, 2014

Number of results: 64,005

**Physics**

At the bow of a ship on a stormy sea, a crewman conducts an experiment by standing on a bathroom scale. In calm waters, the scale reads 180 lb. During the storm, the crewman finds a maximum reading of 235 lb and a minimum reading of 132 lb. Find the maximum upward acceleration...
*Wednesday, January 30, 2013 at 11:35pm by Anonymous*

**physics**

A 48.0 kg child is stationary in the middle of an ice rink (no friction). A 0.750 kg football is thrown with a velocity of 21.2 m/s moving eastward. The child catches the ball and together they slide off in the eastward direction with a velocity of 0.326 m/s. Take east to be ...
*Tuesday, July 16, 2013 at 4:47pm by ODU*

**Physics**

Both start from rest, but experienced Stan leaves the starting line 1.00 s before Kathy. Assume Stan moves with a constant acceleration of 3.45 m/s2 and Kathy maintains an acceleration of 5.10 m/s2. (a) Find the time it takes Kathy to overtake Stan. (b) Find the distance she ...
*Monday, October 18, 2010 at 8:13am by john*

**physics**

an object has an acceleration of 12.5 m/s2. if the net force experienced by the object is decreased by a factor of 4.5 then what is the new acceleration
*Sunday, July 21, 2013 at 6:05pm by jessie*

**PHYSICS**

If a fly collides with the windshield of a fast moving bus a) which experiences the greater impact force: the fly or the bus, or is the same force experienced by both? b)which experiences the greater acceleration: the fly or the bus or is the same acceleration experienced by ...
*Tuesday, November 30, 2010 at 7:46pm by CHRISTIE*

**physics**

Kathy Kool buys a sports car that can accelerate at the rate of 5.00 m/s2. She decides to test the car by racing with another speedster, Stan Speedy. Both start from rest, but experienced Stan leaves the starting line 1.00 s before Kathy. Stan moves with a constant ...
*Thursday, February 10, 2011 at 10:25pm by chuikia*

**Physics (PLEASE HELP!)**

Two point charges, the first with a charge of +3.25×10−6 C and the second with a charge of -4.63×10−6 C , are separated by 25.5 cm. Find the magnitude of the electrostatic force experienced by the positive charge. Is the magnitude of the force experienced by the ...
*Monday, April 4, 2011 at 10:44pm by Allison*

**Physics**

Two point charges, the first with a charge of +3.25×10−6 C and the second with a charge of -4.63×10−6 C , are separated by 25.5 cm. Find the magnitude of the electrostatic force experienced by the positive charge. Is the magnitude of the force experienced by the ...
*Tuesday, April 5, 2011 at 7:30pm by Diddy*

**Physics**

Two point charges, the first with a charge of +3.25×10−6 C and the second with a charge of -4.63×10−6 C , are separated by 25.5 cm. Find the magnitude of the electrostatic force experienced by the positive charge. Is the magnitude of the force experienced by the ...
*Tuesday, April 5, 2011 at 8:32pm by mink*

**physics**

Two point charges, the first with a charge of +3.19×10^−6 C and the second with a charge of -4.32×10^−6 C , are separated by 28.0 cm. Find the magnitude of the electrostatic force experienced by the positive charge. Is the magnitude of the force experienced by the ...
*Monday, January 23, 2012 at 11:32pm by Cooper*

**High School Physics**

Paleontologists estimate that if a Tyrannosaurus rex were to trip and fall, it would have experienced a force of approximately 260,000 acting on its torso when it hit the ground. Assuming the torso has a mass of 3800 kg, find the magnitude of the torso's upward acceleration as...
*Wednesday, September 23, 2009 at 7:41pm by Mia*

**physics**

A 30 kg child steps to a dock from a 60 kg boat,giving the boat an acceleration of 2m/s^2. Neglecting water Resistance, the acceleration experienced by the child is?
*Tuesday, October 4, 2011 at 9:00am by Brittney*

**Physics**

In 1865, Jules Verne proposed sending men to the Moon by firing a space capsule from a 220-m-long cannon with final speed of 10.97 km/s. What would have been the unrealistically large acceleration experienced by the space travelers during their launch? (A human can stand an ...
*Friday, September 21, 2012 at 6:34pm by Kelly*

**Physics**

A young woman named Kathy Kool buys a sports car that can accelerate at the rate of 5.14 m/s 2 . She decides to test the car by drag racing with another speedster, Stan Speedy. Both start from rest, but experienced Stan leaves the starting line 0.78 s before Kathy. Stan moves ...
*Thursday, October 3, 2013 at 8:11pm by Tre*

**just questions**

Why is poverty experienced by Native Americans and that experienced by other groups?
*Tuesday, October 13, 2009 at 1:09pm by Bee*

**Physics**

What is the acceleration experienced by the tip of the 1.5 cm-long sweep second hand on your wrist watch?
*Sunday, October 23, 2011 at 1:14pm by Lilly*

**physics**

What is the acceleration experienced by the tip of the 1.5 cm long sweep second hand on your wrist watch
*Thursday, November 17, 2011 at 4:31pm by Anonymous*

**physics**

Which bug experienced the greatest accelera- tion? 1. Their acceleration is same. 2. Unable to determine. 3. the VW 4. the insect
*Monday, October 4, 2010 at 10:47am by Wendia*

**physics**

Two point charges, the first with a charge of +3.04×10−6 C and the second with a charge of -4.63×10−6 C , are separated by 22.5 cm. Find the magnitude of the electrostatic force experienced by the positive charge. Is the magnitude of the force experienced by the ...
*Friday, January 27, 2012 at 1:39pm by jazz*

**Physics**

Two colliding objects exert equal and opposite forces on each other (Newton's Third Law). However, acceleration experienced by an object is inversely related to its mass: the smaller the mass, the larger the acceleration for a given force (pp. 49-50). Therefore the motorcycle ...
*Sunday, September 15, 2013 at 8:09pm by Need help badly*

**PHYSICS**

Junes Verne in 1865 suggested sending people to the Moon by firing a space capsule from a 255 m long cannon with a launch speed of 11.42 km/s. What would have been the unrealistically large acceleration experienced by the space travelers during launch? Compare your answer with...
*Saturday, November 1, 2008 at 7:42pm by maybo*

**physic**

Jules Verne in 1865 suggested sending people to the Moon by firing a space capsule from a 220-m-long cannon with a launch speed of 10.97 km/s. What would have been the unrealistically large acceleration experienced by the space travelers during launch? Compare your answer with...
*Thursday, October 8, 2009 at 9:01am by aRd*

**Physics**

PLEASE ANSWER ASAP!!!!!!!!!! step by step a) find the acceleration experienced by the driver of a car traveling at 50km/h if the car hits a pole and crumples 50cm. b) repeat part a) for a car traveling 100km/h
*Wednesday, July 25, 2012 at 6:06am by ice*

**Physics**

PLEASE ANSWER ASAP!!!!!!!!!! step by step a) find the acceleration experienced by the driver of a car traveling at 50km/h if the car hits a pole and crumples 50cm. b) repeat part a) for a car traveling 100km/h
*Wednesday, July 25, 2012 at 7:43am by ice*

**p**

A roller coater has a first drop of 140 meters and then enters a circular loop. Find the maximum radius of the loop such that the coaster never leaves the track at the top of the loop. Using the radius found in part 1, calculate the largest centripetal acceleration experienced...
*Monday, April 9, 2012 at 8:21pm by Mary*

**Physics question **

Paleontologists estimate that if a Tyrannosaurus rex were to trip and fall, it would have experienced a force of approximately 260,000 N acting on its torso when it hit the ground. Question 1 Assuming the torso has a mass of 3800 kg , find the magnitude of the torso's upward ...
*Wednesday, September 23, 2009 at 8:56pm by Mia*

**Physics Problem**

Paleontologists estimate that if a Tyrannosaurus rex were to trip and fall, it would have experienced a force of approximately 260,000 N acting on its torso when it hit the ground. Question 1 Assuming the torso has a mass of 3800 kg , find the magnitude of the torso's upward ...
*Wednesday, September 23, 2009 at 10:52pm by Cayla*

**physics**

a) calculate the acceleration of a 0.55-m-diameter car tire while the car is traveling at a constant speed of 25m/sec. b) compare this with acceleration experienced by a jet car tire of diameter 1.0m when setting a land speed record of 310m/sec
*Monday, September 26, 2011 at 5:29pm by lucy *

**Ap Physics**

Paleontologists estimate that if a Tyrannosaurus rex were to trip and fall, it would have experienced a force of approximately 260,000N acting on its torso when it hit the ground. Assuming the torso has a mass of 3800kg , find the magnitude of the torso's upward acceleration ...
*Thursday, September 24, 2009 at 2:05am by Tiffany*

**astronomy**

Calculate the tidal force experienced by Io. How does it compare to the tidal force experienced by the Moon due to the Earth? What would the Earth-Moon distance (i.e., distance between their centres) need to be in order for the Moon to experience similar tidal forces to those ...
*Sunday, November 20, 2011 at 1:59am by roach*

**physics**

Calculate the tidal force experienced by Io. How does it compare to the tidal force experienced by the Moon due to the Earth? What would the Earth-Moon distance (i.e., distance between their centres) need to be in order for the Moon to experience similar tidal forces to those ...
*Sunday, November 20, 2011 at 2:01am by roach*

**college physics**

i need solutions for all this problems...help please.... 1.) an electron moving at a speed of 4x10 power of 6 m/s, shot through a sheet of paper which is 3x10 to power of -5 m thick. the electron energyfrom the sheet with with a speed of 2x10 to the power of 6 m/s. find the a...
*Wednesday, July 29, 2009 at 10:32am by jhenz*

**PHYSICS**

A space station shaped like a giant wheel has a radius 105 m and a moment of inertia of 5.09 108 kg · m2. A crew of 150 lives on the rim, and the station is rotating so that the crew experiences an apparent acceleration of 1g. When 100 people move to the center of the station ...
*Wednesday, October 31, 2012 at 3:37pm by PLEASE HELP*

**Physics **

A space station shaped like a giant wheel has a radius 105 m and a moment of inertia of 5.09 108 kg · m2. A crew of 150 lives on the rim, and the station is rotating so that the crew experiences an apparent acceleration of 1g. When 100 people move to the center of the station ...
*Thursday, November 1, 2012 at 1:30pm by Ashley*

**Grade 12 Physics**

A young woman named Sassy Sue purchases a sports utility vehicle that can accelerate at the rate of 4.88m/s^2. She decides to test the car by dragging with another speedster, McSpeedy. Both start from rest, but experienced McSpeedy leaves 1.0s before Sue. If McSpeedy moves ...
*Wednesday, September 12, 2007 at 4:36pm by Haley*

**Intro to physics**

A space station shaped like a giant wheel has a radius 105 m and a moment of inertia of 5.09 108 kg · m2. A crew of 150 lives on the rim, and the station is rotating so that the crew experiences an apparent acceleration of 1g. When 100 people move to the center of the station ...
*Wednesday, October 31, 2012 at 12:10pm by Sam*

**Physics**

Liz rushes down onto a subway platform to find her train already departing. She stops and watches the cars go by. Each car is 8.60 m long. The first moves past her in 1.75 s and the second in 1.17 s. Find the constant acceleration of the train. I know how to find average ...
*Saturday, October 10, 2009 at 11:46pm by Erin*

**Socialogy**

Some associate Indian Gaming is financial security for Native Americans.If this is the case, why is poverty experienced by Native Americans ad that experienced by other groups?
*Tuesday, October 13, 2009 at 1:39pm by Bee*

**Physics**

The fast French train known as the TGV (Train ŕ Grande Vitesse) has a scheduled average speed of 216 km/h. (a) If the train goes around a curve at that speed and the acceleration experienced by the passengers is to be limited to 0.060g, what is the smallest radius of curvature...
*Saturday, July 10, 2010 at 5:58pm by Sam*

**Physics **

A young woman named Kathy Kool buys a sports car that can accelerate at the rate of 4.77 m/s2. She decides to test the car by dragging with another speedster, Stan Speedy. Both start from rest, but experienced Stan leaves the starting line 1.04 s before Kathy. If Stan moves ...
*Thursday, February 2, 2012 at 12:55am by Mathew*

**Physics**

A young woman named Kathy Kool buys a sports car that can accelerate at the rate of 4.53 m/s2. She decides to test the car by dragging with another speedster, Stan Speedy. Both start from rest, but experienced Stan leaves the starting line 1.01 s before Kathy. If Stan moves ...
*Friday, September 20, 2013 at 1:54am by Connor*

**PHYSICS PLZ HELP =-(**

Paleontologists estimate that if a Tyrannosaurus rex were to trip and fall, it would have experienced a force of approximately 260,000 N acting on its torso when it hit the ground. Question 1 Assuming the torso has a mass of 3800 kg , find the magnitude of the torso's upward ...
*Wednesday, September 23, 2009 at 9:54pm by Mia*

**Health (Ms. Sue)**

Are these adequate ways to cope with the changes that I have experienced? State three ways that you have experienced during adolescence. Then, identify two changes to cope with these changes. A: Three of the changes during adolescence that I have experienced are increases in ...
*Saturday, December 7, 2013 at 10:46pm by Anonymous*

**AP PHYSICS**

The fast train known as teh TGV that runs south from Paris, France, has a scheduled average speed of 216 km/h. If the train goes around a curve at teha speed and the acceleration experienced by the passengers is to be limited to .07g, what is the smallest radius of curvature ...
*Sunday, September 30, 2007 at 10:08pm by Kristen*

**Physics**

To find the velocity and acceleration vectors for uniform circular motion and to recognize that this acceleration is the centripetal acceleration. Suppose that a particle's position is given by the following expression: r(t) = Rcos(omega*t)i + Rsin(omega*t)j Velocity equals...
*Friday, November 13, 2009 at 8:14pm by Becky*

**Physics**

A young woman named Kathy Kool buys a sports car that can accelerate at the rate of 4.6 m/s2. She decides to test the car by dragging with another speedster, Stan Speedy. Both start from rest, but experienced Stan leaves the starting line 0.8 s before Kathy. If Stan moves with...
*Wednesday, March 28, 2012 at 7:28am by Dave*

**Physics forces unit**

I was wondering, how I would find the ratio of force to acceleration? I am doing an assignment where i had to find the force applied and the measured acceleration but I don't know how to find the ratio of force to acceleration. Thanks in advance!
*Thursday, January 9, 2014 at 5:44pm by Diane*

**physics**

A young woman named Kathy Kool buys a sports car that can accelerate at the rate of 4.16 m/s2. She decides to test the car by drag racing with another speedster, Stan Speedy. Both start from rest, but experienced Stan leaves the starting line 0.58 s before Kathy. Stan moves ...
*Saturday, October 13, 2012 at 11:17am by Sonia*

**calculus **

Flight Path. In this problem you will use a cosine function to model the flight path of a plane that begins its descent from 20000 ft when it is 45 miles from the airport. Find the fuction p(x)= ACos(wx)+B that that gives the altitude in ft when the plane is x miles from the ...
*Monday, April 1, 2013 at 6:43pm by Tom*

**math**

Flight Path. In this problem you will use a cosine function to model the flight path of a plane that begins its descent from 20000 ft when it is 45 miles from the airport. Find the fuction p(x)= ACos(wx)+B that that gives the altitude in ft when the plane is x miles from the ...
*Tuesday, April 2, 2013 at 1:13am by T-Man*

**math**

Flight Path. In this problem you will use a cosine function to model the flight path of a plane that begins its descent from 20000 ft when it is 45 miles from the airport. Find the fuction p(x)= ACos(wx)+B that that gives the altitude in ft when the plane is x miles from the ...
*Tuesday, April 2, 2013 at 2:52pm by tom*

**math**

Flight Path. In this problem you will use a cosine function to model the flight path of a plane that begins its descent from 20000 ft when it is 45 miles from the airport. Find the fuction p(x)= ACos(wx)+B that that gives the altitude in ft when the plane is x miles from the ...
*Wednesday, April 3, 2013 at 3:02am by momo*

**Physics**

I don't know where to start with this one. "Find the work done accelerating a 2 kg box from 2m/s to 3 m/s." Can't find acceleration because I don't know time. In fact, I don't see how any of the kinematic equations can help me out to find either distance or acceleration so ...
*Monday, April 6, 2009 at 11:51pm by KC*

**Physics Help**

You're driving at 39km/h , when the traffic light 25m away turns yellow. I need to find the constant acceleration required to stop at the light, the stopping time, and weather the acceleration is reasonable. I know how to find the average and instantaneous acceleration, but ...
*Tuesday, January 28, 2014 at 12:54am by Eiban*

** Urgent!!! Physics**

At an air show, a jet plane has velocity components Vx = 625 and Vy = 415 at time 3.85s and Vx = 838 and Vy = 365 at time 6.52s . A. For this time interval, find the x component of the plane's average acceleration in km/h2. B. For this time interval, find the y component of ...
*Wednesday, January 26, 2011 at 9:46pm by andrea*

**physics**

I have two equations: #1) Tcos(theta)- 6.86=0 #2) Tsin(theta) = mass X acceleration I know that my acceleration is velociy squared/ radius (my given radius is 40cm) I'm supposed to solve for T and angular acceleration. I know I'd be able to do that if I could find what theta ...
*Tuesday, October 12, 2010 at 9:02pm by Taylor*

**physics**

A couple of astronauts agree to rendezvous in space after hours. Their plan is to let gravity bring them together. She has a mass of 66.0 kg and he a mass of 72.0 kg, and they start from rest 25.0 m apart. 1)Find his initial acceleration. 2)Find her initial acceleration. 3)If ...
*Wednesday, February 15, 2012 at 3:09pm by HH*

**LA**

How did the Civil War affect the Northern and Southern economies? A;The North experienced more severe inflation than the South. B;Overall the South fared much worse economically than the North. C;The South experienced a boom in manufacturing. D;The North's economy was ...
*Thursday, April 11, 2013 at 4:55pm by justin*

**physics**

Junes Verne in 1865 suggested sending people to the Moon by firing a space capsule from a 255 m long cannon with a launch speed of 11.42 km/s. What would have been the unrealistically large acceleration experienced by the space travelers during launch?
*Saturday, November 1, 2008 at 7:08pm by jay*

**Physics**

Junes Verne in 1865 suggested sending people to the Moon by firing a space capsule from a 195 m long cannon with a launch speed of 12.78 km/s. What would have been the unrealistically large acceleration experienced by the space travelers during launch? ____ m/s^2
*Wednesday, September 1, 2010 at 12:55am by Z32*

**Calculus **

The equation of motion of a particle is s= 2y^3 - 7t^2 + 4t +1 where s is in meters and t is in seconds a) Find the velocity and acceleration as functions of t. b) Find the acceleration after 1 second.
*Sunday, February 24, 2013 at 5:15pm by Jilian*

**physics**

Consider the motion of an object along a straight path as shown in the ﬁgure. 1 0 1 2 3 4 5 6 7 8 9 b b b b b b b b time (s) velocity (m/s) Find the average acceleration during the time interval 0 s to 3 s. Answer in units of m/s 2 005 (part 2 of 6) 10.0 points Find the...
*Thursday, January 17, 2013 at 1:17am by Anonymous*

**Physics**

typically a bullet leaves a standard 45 caliber pistol at 262 m/s. if it takes i millisecond to transverse the barrel, determine the average acceleration experienced by the 16.2 gram bullet within the gun's barrel and then compute the average force exerted on it
*Sunday, November 6, 2011 at 3:59pm by Amanda and Leah*

**Physics**

At an air show, a jet plane has velocity components vx = 695 km/h and vy = 440 km/h at time 4.85s and vx= 933km/h and vy = 465 km/h at time 7.12 s. For this time interval, find (a) the x and y components of the plane’s average acceleration and (b) the magnitude and direction ...
*Saturday, January 21, 2012 at 6:28pm by MOMO*

**Math - check answer**

Given v = 4t - 9t3, find the acceleration when t = 1 s. acceleration in m/s2 = My Answer V'=4-27t2 V"= -54t V"(1)= -54 acceleration in m/s2 = positive 54 Can you please confirm this is correct???? Thanks
*Tuesday, January 29, 2013 at 5:55pm by Brownie*

**calculus**

THe equation of motion of a particle is s = t^3 - 3t, where s is in meters and t is in seconds. Find (a) the velocity and acceleration as functions of t (b) the acceleration after 2 s, and (c) the acceleration when the velocity is 0
*Tuesday, October 14, 2008 at 10:05pm by Frank*

**Math**

A particle moves in a linear motion according to: s = 10 - 6t2. Find the acceleration of the particle at t = 4s. acceleration in m/s2 = My Answer s'= 0-12t s"= -12 acceleration in m/s2 = -12
*Tuesday, January 29, 2013 at 6:02pm by Brownie*

**physics **

A merry-go-round starts from rest and accelerates uniformly over 29.0 s to a final angular velocity of 5.35 rev/min. (a) Find the maximum linear speed of a person sitting on the merry-go-round 4.50 m from the center. (b) Find the person's maximum radial acceleration. (c) Find ...
*Tuesday, March 1, 2011 at 12:08pm by Anonymous*

**physics**

A merry-go-round starts from rest and accelerates uniformly over 26.0 s to a final angular velocity of 5.50 rev/min. (a) Find the maximum linear speed of a person sitting on the merry-go-round 4.25 m from the center. (b) Find the person's maximum radial acceleration. (c) Find ...
*Wednesday, March 14, 2012 at 1:23pm by John*

**Physics**

A rocket is launched at an angle of 42◦ above the horizontal with an initial speed of 76 m/s. It moves for 9 s along its initial line of motion with an acceleration of 29 m/s^2. At this time its engines fail and the rocket proceeds to move as a projectile. The ...
*Monday, September 6, 2010 at 9:26pm by John*

**Social Civics**

Today unions (A)Have generally experienced a tremendous increase in membership (B)Have not succeeded in organizing any white-collar workers (C)Are divided into two large organizations, the A.F.L. and the C.I.O. (D)Have generally experienced a decline in membership, especially ...
*Thursday, February 4, 2010 at 11:15am by Anna*

**Physics**

At an air show, a jet plane has velocity components vx = 695 km/h and vy = 440 km/h at time 4.85s and vx= 933km/h and vy = 465 km/h at time 7.12 s. For this time interval, find (a) the x and y components of the plane’s average acceleration and (b) the magnitude and direction ...
*Sunday, January 22, 2012 at 9:51am by mo*

**Physics**

At an air show, a jet plane has velocity components vx = 695 km/h and vy = 440 km/h at time 4.85s and vx= 933km/h and vy = 465 km/h at time 7.12 s. For this time interval, find (a) the x and y components of the plane’s average acceleration and (b) the magnitude and direction ...
*Sunday, January 22, 2012 at 9:51am by mo*

**physics-forces**

Kara (55kg) is standing next to her brother Ben (80kg) on a large piece on frictionless ice. Kara decided to push her brother with a force of 200N expecting him to slide across the ice while she remains standing in the middle of the ice rink laughing. a) Describe the motion ...
*Monday, January 20, 2014 at 1:09pm by Diane*

**Science Plz help**

1. Acceleration involves a change in ____. speed velocity displacement direction 2. Which of the following statements about acceleration is true? Like velocity, acceleration has a direction. Your acceleration is positive when you speed up. Your acceleration is negative when ...
*Friday, March 29, 2013 at 1:42pm by Jman*

**Physics**

An airplane is flying in a horizontal circle at a speed of 106 m/s. The 81.0 kg pilot does not want the centripetal acceleration to exceed 6.16 times free-fall acceleration. Find the minimum radius of the plane’s path. The acceleration due to gravity is 9.81 m/s2. Answer in ...
*Tuesday, November 13, 2012 at 7:39pm by Kyla*

**Physics**

An airplane is flying in a horizontal circle at a speed of 104 m/s. The 73.0 kg pilot does not want the centripetal acceleration to exceed 6.98 times free-fall acceleration. Find the minimum radius of the plane’s path. The acceleration due to gravity is 9.81 m/s2. Answer in ...
*Tuesday, March 5, 2013 at 8:02pm by Anonymous*

**Reading**

Experienced superhighway drivers know the importance of staying behind or ahead of what some people call wolf packs –- several fast-moving vehicles bunched together. Wolf-packing can be the cause of high-speed fatalities. This passage was probably written for people who are: a...
*Sunday, March 27, 2011 at 10:33pm by Arlynn*

**physics**

1. What is the acceleration on the Earth? Remember the equation for an object that starts at rest is this: d = 1/2at2 ( this is an experiment for droping a ball from a 6 meter hight and seeing how long it takes to get to the floor from 6 meters, it took 1.9 seconds to reach ...
*Wednesday, October 3, 2007 at 1:01pm by Bongo*

**physics**

A ball rolls along flat ground at 7.0 m/s then encounters a hill. If the ball rolls 15 m up the hill before coming to a stop, what was the acceleration (in m/s2) experienced by the ball as it rolled up the hill?
*Thursday, September 12, 2013 at 9:37pm by dominique*

**Macroeconomics**

Between 1968 and 1980, the US economy experienced a slowdown in productivity growth. However, since the mid 1980s, the economy has experienced increases in the growth rate in productivity. Can you give reasons why US productivity growth started to increase during the late ...
*Sunday, July 6, 2008 at 10:13am by Sara*

**macroenconomics**

Between 1968 and 1980, the US economy experienced a slowdown in productivity growth. However, since the mid 1980s, the economy has experienced increases in the growth rate in productivity. Can you give reasons why US productivity growth started to increase during the late ...
*Saturday, March 27, 2010 at 11:46pm by Ismael*

**Macroeconomics**

Between 1968 and 1980, the US economy experienced a slowdown in productivity growth. However, since the mid 1980s, economy has experienced increased in the growth rate in productivity. Can you give reasons why US productivity growth started to increase during the late 1980s ...
*Monday, June 14, 2010 at 7:21pm by Sara*

**Physics - acceleration..need to find velocity**

I am given two points on an acceleration vs time graph: (-2,13),(4,0). When t = -2s, v = 10 m\s. What velocity at t = 6s? I believe acceleration average is (-13/6), but how do I solve the rest get the correct answer, which is 44.7 m/s? Any help or hints would be greatly ...
*Friday, October 21, 2011 at 11:22am by Belinda*

**Maths mst**

Question – 3: Consider a particle moving according to the velocity function, v(t) = 2a-3exp(-2t)+2/t+2,for t>0. (a) If the net distance,d,covered by the particle in the time interval,[0,3],is 20,find the value of a. What is the terminal velocity of the particle?. (b) Find ...
*Saturday, May 10, 2008 at 5:00pm by Victoria*

**physics**

An Atwood Machine has a pulley of radius Rpulley = 0.25m, and mass Mpulley = 6.0 kg with two blocks with masses m1 = 5.0 kg, and m2 = 10.0 kg. Treat the pulley as a uniform disk. a) Find the acceleration of each block. b) Find the angular acceleration of the pulley. c) Find ...
*Monday, December 11, 2006 at 2:54pm by nicole*

**physics**

Rocket-powered sleds are used to test the responses of humans to acceleration. Starting from rest, one sled can reach a speed of 444 m/s in 1.80 s and can be brought to a stop again in 2.15 s. (a) Calculate the acceleration of the sled when starting, and compare it to the ...
*Tuesday, September 21, 2010 at 10:21pm by Anonymous*

**physics**

A test car starts out from rest on a horizontal circular track of 80m radius and increases it's speed at a uniform rate to reach 27.78 m/s in 10s. Find the magnitude of the total acceleration of the car 8s after the start. Ok so I know that the total acceleration is the square...
*Friday, October 9, 2009 at 7:07pm by Jessi*

**Physics**

An airplane is ﬂying in a horizontal circle at a speed of 104 m/s. The 88.0 kg pilot does not want the centripetal acceleration to exceed 6.15 times free-fall acceleration. Find the minimum radius of the plane’s path. The acceleration due to gravity is 9.81m/s2. Answer ...
*Friday, February 8, 2013 at 5:03pm by Dave*

**AED / ASAP PLEASE 2**

Review the experienced teacher’s lesson plan in Figure 3.3 on p. 78 of the text. Write a 200- to 300-word response by adding more detail to the experienced teacher’s lesson plan: o Provide ideas for motivating students. o Create question prompts. o Suggest methods for ...
*Friday, October 24, 2008 at 10:46pm by dawn*

**Ap Physics 1**

The 1800 kg tractor exerts a force of 1.75 104 N backward on the pavement, and the system experiences forces resisting motion that total 2400 N. If the acceleration is 0.210 m/s2, what is the mass of the airplane? (b) Calculate the force exerted by the tractor on the airplane...
*Tuesday, December 10, 2013 at 9:37am by Physics Help!*

**Ap Physics 1**

The 1800 kg tractor exerts a force of 17500N backward on the pavement, and the system experiences forces resisting motion that total 2400 N. If the acceleration is 0.210 m/s2, what is the mass of the airplane? (b) Calculate the force exerted by the tractor on the airplane, ...
*Tuesday, December 10, 2013 at 9:53am by Physics Help!*

**physics**

A football is thrown horizontally with an initial velocity of (16.5 m/s). Ignoring air resistance, the average acceleration of the football over any period of time is (-9.81 m/s2). (a) Find the velocity vector of the ball 1.62 s after it is thrown. (b) Find the magnitude and ...
*Monday, May 14, 2007 at 7:52pm by micole*

**AP Calculous**

A particle moves on the x –axis so that its position at any time is given by x(t) = 2t3 + 1. a. Find the acceleration of the particle at t = 0. b. Find the velocity of the particle when its acceleration is 0. c. Find the total distance traveled by the particle from t = 0 to t...
*Sunday, November 6, 2011 at 1:00am by Yoona*

**calculous**

A particle moves on the x –axis so that its position at any time is given by x(t) = 2t3 + 1. a. Find the acceleration of the particle at t = 0. b. Find the velocity of the particle when its acceleration is 0. c. Find the total distance traveled by the particle from t = 0 to t...
*Monday, November 7, 2011 at 9:07am by Yoona*

**HS Calculus**

Having trouble with this questions. Please help. A particle moves on the x-axis so that its position at any time t (is greater than or equal to) 0 is given by x(t) = 2te^-t a) Find the acceleration of the particle at t=0 b)find the velocity of the particle when its ...
*Sunday, March 29, 2009 at 11:24pm by Jane*

**Physics ( electrical )**

If I have two objects charged, one on a insulated thread and one stationary, and I have one distances and an acceleration and I double the distance, I want to find out the acceleration, what formula do I use? ( the distance is halved and I need to find out the magnitude of the...
*Sunday, May 27, 2012 at 7:18pm by Art*

**PHYSICS HELP**

A couple of astronauts agree to rendezvous in space after hours. Their plan is to let gravity bring them together. She has a mass of 66.0 kg and he a mass of 72.0 kg, and they start from rest 25.0 m apart. A)Find his initial acceleration. i put 7.68* 10^-12 m/s^2 B)Find her ...
*Thursday, February 16, 2012 at 2:58pm by Gina*

**AP Physics B**

can you check my reasoning 1. The problem statement, all variables and given/known data ok well then... we did a lab were you have a hanging mass attached to a stirng that went through a straw and was attached to a rubber stopper. The lab was to find the mass of the rubber ...
*Sunday, September 13, 2009 at 8:42pm by AP Physics B*

**Sociology**

1. If you were visiting and studying the Yanomamo, describe what you have done to prepare yourself for possible culture shock. 2. Describe a personal experience you have had where you experienced culture shock. What components of culture were you shocked by? 3. Explain how ...
*Wednesday, June 18, 2008 at 4:19pm by culture shock*

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