Thursday

September 3, 2015
Number of results: 61,997

**physics**

A car moves from rest with a constant acceleration of 4m/s squared for 5s .IT then continues with the speed attained for10s and then accelerates at 2m/s squared for 10s.A/ SKETCH A SPEED TIME GRAPH FOR THE WHOLE MOTION GIVING YOUR VALUES ON BOTH AXES.B/CALCULATE THE AVERAGE ...
*January 4, 2015 by Gabriella*

**College Physics **

Two forces, F⃗ 1 and F⃗ 2, act at a point, as shown in the picture. (Figure 1) F⃗ 1 has a magnitude of 8.20N and is directed at an angle of α = 55.0∘ above the negative x axis in the second quadrant. F⃗ 2 has a magnitude of 6.40N and is ...
*April 5, 2014 by Danilo*

**Physics**

An object with a mass of 2.728x10^1 kg is subjected to a force of 1.31851x10^3 N directed at an angle of 1.056x10^1 degrees from the x axis. A second force of 1.93826x10^3 N acting in the negative Y directions is also applied to the object. To two significant figures what is ...
*October 22, 2010 by christine*

**physics**

A cart of mass 340 g moving on a frictionless linear air track at an initial speed of 1.2 m/s undergoes an elastic collision with an initially stationary cart of unknown mass. After the collision the first cart continues in its original direction at .66m/s. a) what is the mass...
*March 3, 2007 by Chris*

**nova**

7) You throw a 12-N stone vertically into the air from ground level. You observe that when it is 15.0 m above the ground, it is traveling at 25.0 m/s upward. Use the work energy theorem to find (a) the stones speed just as it left the ground and (b) its maximum height. 8) A ...
*September 20, 2014 by papy*

**physics**

A drag racer, starting from rest, speeds up for 402 m with an acceleration of +17 m/s^2. A parachute then opens, slowing the car down with an acceleration of -6.10 m/s^2. How fast us the racer moving 3.50*10^2 m after the parachute opens?
*November 11, 2008 by Anonymous*

**physics**

A drag racer, starting from rest, speeds up for 402 m with an acceleration of +18.0 m/s2. A parachute then opens, slowing the car down with an acceleration of -6.30 m/s^2. How fast is the racer moving 2.70 x 10^2 m after the parachute opens?
*August 15, 2010 by Anonymous*

**Physics**

A 25kg crate is sitting at the bottom of an inclined plane. The inclined plane 12m long meets the horizontal at an angle of 15 degrees and has a coefficient of friction of 0.55. A force is applied to the crate so as to slide the crate up the incline at a constant speed. What ...
*February 25, 2012 by Rob*

**physics**

Coasting due east on your bicycle at 8.0 m/s, you encounter a sandy patch of road 7.4 m across. When you leave the sandy patch your speed has been reduced to 5.5 m/s. Assuming the bicycle slows with constant acceleration, what was its acceleration in the sandy patch? Give both...
*September 16, 2013 by john*

**Physics (please help!!!!)**

A car experiences rolling (tractive) friction with coecient of friction mut = 0.0200, and turbulent-flow (bv^2) drag, with drag coefficient CD = 0.300. The car has mass (including fuel, which is a negligible fraction of the total) M = 1000. kg and frontal cross-sectional area...
*April 12, 2011 by Cecille*

**Physics**

A long, thin rod (length = 4.0 m) lies along the x axis, with its midpoint at the origin. In a vacuum, a +5.0 C point charge is fixed to one end of the rod, while a -5.0 C point charge is fixed to the other end. Everywhere in the x, y plane there is a constant external ...
*January 26, 2013 by Amy*

**Physics**

A long, thin rod (length = 4.0 m) lies along the x axis, with its midpoint at the origin. In a vacuum, a +5.0 C point charge is fixed to one end of the rod, while a -5.0 C point charge is fixed to the other end. Everywhere in the x, y plane there is a constant external ...
*January 26, 2013 by Amy*

**Physics**

a 5kg block is pushed 3m up a vertical wall with constant speed by a constant force of magnitude f applied at an angle of 30 degrees with the horizontal. if the coefficient of kinetic friction between block and wall is .3, determine the work done by a) f b) the force of ...
*April 20, 2013 by Annette*

**posting again! please help!! physics**

A skateboarder, starting from rest, rolls down a 14.0-m ramp. When she arrives at the bottom of the ramp her speed is 7.40 m/s. (a) Determine the magnitude of her acceleration, assumed to be constant. (b) If the ramp is inclined at 20.5 with respect to the ground, what is the...
*October 6, 2010 by michelle*

**algebra**

A car travels at a constant rate of 45 mph on a highway iffinitely (assume it never has to stop for gas) How far has the car traveled after x minutes? 45 miles/hr * (1/60 hr/minute) * x minutes = 3/4 x miles (if x is in minutes)
*June 26, 2007 by Anonymous*

**Physics-energy**

Calculate the thermal energy dissipated from brakes in a 1310-kg car that descends a 13.5 hill. The car begins braking when its speed is 88 km/h and slows down to a speed of 34 km/h in a distance of 0.52 km measured along the road.
*February 16, 2010 by Anonymous*

**physics - Energy**

An ore car of mass 41000 kg starts from rest and rolls downhill on tracks from a mine. At the end of the tracks, 9.6 m lower vertically, is a horizontally situated spring with constant 4.7 10^ 5 N/m. The acceleration of gravity is 9.8 m/s^ 2. Ignore friction. How much is the...
*January 14, 2012 by rei*

**physics**

1 An object is thrown upward from the edge of a tall building with a velocity of 10 m/s. Where will the object be 3 s after it is thrown? Take g=10ms−2 15 m above the top of the building 30 m below the top of the building 15 m below the top of the building 30 m above ...
*February 17, 2014 by james*

**physics**

A drag racer, starting from rest, speeds up for 402 m with an acceleration of +24.0 m/s2. A parachute then opens, slowing the car down with an acceleration of -5.40 m/s2. How fast is the racer moving 3.75 102 m after the parachute opens?
*January 31, 2010 by Anonymous*

**Physics**

A drag racer, starting from rest, speeds up for 402 m with an acceleration of +24.0 m/s2. A parachute then opens, slowing the car down with an acceleration of -6.10 m/s2. How fast is the racer moving 2.55 102 m after the parachute opens?
*August 17, 2010 by yoyoma*

**physics**

A drag racer, starting from rest, speeds up for 402 m with an acceleration of +20.0 m/s2. A parachute then opens, slowing the car down with an acceleration of -5.20 m/s2. How fast is the racer moving 3.75 102 m after the parachute opens?
*August 30, 2010 by demi*

**AP physics**

A drag racer, starting from rest, speeds up for 402 m with an acceleration of +23.0 m/s2. A parachute then opens, slowing the car down with an acceleration of -5.10 m/s2. How fast is the racer moving 2.50 102 m after the parachute opens?
*September 27, 2010 by arian*

**phsics**

A drag racer, starting from rest, speeds up for 402 m with an acceleration of +16.0 m/s2. A parachute then opens, slowing the car down with an acceleration of -5.60 m/s2. How fast is the racer moving 2.90 102 m after the parachute opens?
*August 23, 2011 by Paul*

**physics**

A drag racer, starting from rest, speeds up for 384 m with an acceleration of +19.3 m/s2. A parachute then opens, slowing the car down with an acceleration of -6.33 m/s2. How fast is the racer moving 302 m after the parachute opens?
*December 13, 2011 by chris*

**Physics**

A drag racer, starting from rest, speeds up for 393 m with an acceleration of +16.3 m/s2. A parachute then opens, slowing the car down with an acceleration of -5.51 m/s2. How fast is the racer moving 3.31E+2 m after the parachute opens?
*January 30, 2013 by L'dya*

**Physics**

A drag racer, starting from rest, speeds up for 393 m with an acceleration of +16.3 m/s2. A parachute then opens, slowing the car down with an acceleration of -5.51 m/s2. How fast is the racer moving 3.31E+2 m after the parachute opens?
*January 30, 2013 by L'dya*

**physics**

a yo-yo is spun from rest by pulling on the string with a constant tension of 2.0N. The radius of the inner rod on which the string is strung around is 0.50cm. the tension applied for 5.0seconds after which the yo-yo is observed to spin with an angular velocity of 15 rad/sec a...
*March 23, 2013 by kirafreedom*

**physical science**

How much time should be allowed for a 392-km car trip if the car will be traveling at 120 km/h?
*December 4, 2009 by sandy*

**Physics**

a 1000 kg car traveling at 30 m/s suddenly stops in 5 seconds. how much force was used to stop the car?
*April 13, 2011 by Kay*

**Physics**

A car is traveling at 24.4 m/s. If the driver has a reaction time of 1 second, what will be his stopping distance if his car slows down at 8 m/s2?
*September 19, 2013 by Joseph*

**physics**

A car traveling at2.24m/s skids and stops in 2.55s determine the skidding distance of car
*June 30, 2014 by Anonymous*

**physics**

A car is stopped for a traffic signal. When the light turns green, the car accelerates, increasing its speed from 0 to 5.85 m/s in 0.712 s. What is the magnitude of the linear impulse experienced by a 70.5 kg passenger in the car during this time?
*March 16, 2013 by Anonymous*

**science physics**

arthur is riding a horse at a velocity of 4m/s. four seconds after, he is already traveling at a velocity of 12m/s. what is his acceleration
*October 7, 2013 by Fatima*

**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 ...
*January 28, 2014 by Eiban*

**Math**

The table gives, for a particular object, the acceleration A caused by an applied force F. Acceleration (A)10 15 20 25 30 Force(F) 50 75 100 125 150 What force is required to produce an acceleration of 19? A) 19 B) 95 C) 114 D) 38
*August 5, 2010 by Sharee*

**Peninsula college **

Wendy is traveling 120 miles away from chasity. They are traveling towards each other. If chasity travels 4 mph faster than Wendy and they meet after 4 hours, how fast was each traveling?
*July 7, 2015 by Samantha*

**Physics**

A car (mass = 1150 kg) is traveling at 32 m/s when it collides head-on with a sport utility vehicle (mass = 2550 kg) traveling in the opposite direction. In the collision, the two vehicles come to a halt. At what speed was the sport utility vehicle traveling?
*April 1, 2008 by Will*

**Physics**

A car (mass = 1180 kg) is traveling at 36 m/s when it collides head-on with a sport utility vehicle (mass = 2380 kg) traveling in the opposite direction. In the collision, the two vehicles come to a halt. At what speed was the sport utility vehicle traveling?
*February 22, 2011 by Lauren*

**Physics**

A car (mass = 1070 kg) is traveling at 40 m/s when it collides head-on with a sport utility vehicle (mass = 2570 kg) traveling in the opposite direction. In the collision, the two vehicles come to a halt. At what speed was the sport utility vehicle traveling?
*November 9, 2011 by Taylor*

**physics**

A car (mass = 1100 kg) is traveling at 33.0 m/s when it collides head-on with a sport utility vehicle (mass = 2800 kg) traveling in the opposite direction. In the collision, the two vehicles come to a halt. At what speed was the sport utility vehicle traveling?
*May 3, 2012 by !@#$%^&al*

**Physics**

A car (mass = 1080 kg) is traveling at 25.4 m/s when it collides head-on with a sport utility vehicle (mass = 2750 kg) traveling in the opposite direction. In the collision, the two vehicles come to a halt. At what speed was the sport utility vehicle traveling?
*January 2, 2013 by Tim*

**physics**

In designing rotating space stations to provide for artificial-gravity environments, one of the constraints that must be considered is motion sickness. Studies have shown that the negative effects of motion sickness begin to appear when the rotational motion is faster than ...
*December 19, 2010 by jessica*

**physics**

In designing rotating space stations to provide for artificial-gravity environments, one of the constraints that must be considered is motion sickness. Studies have shown that the negative effects of motion sickness begin to appear when the rotational motion is faster than ...
*November 7, 2012 by Anonymous*

**college physics**

A drag racer, starting from rest, speeds up for 402 m with an acceleration of +24.0 m/s2. A parachute then opens, slowing the car down with an acceleration of -5.40 m/s2. How fast is the racer moving 3.75 102 m after the parachute opens
*January 31, 2010 by brittany*

**College Physics 1**

A drag racer, starting from rest, speeds up for 402 m with an acceleration of +24.0 m/s2. A parachute then opens, slowing the car down with an acceleration of -5.40 m/s2. How fast is the racer moving 3.75 102 m after the parachute opens
*January 31, 2010 by james*

**College Physics 1**

A drag racer, starting from rest, speeds up for 402 m with an acceleration of +24.0 m/s2. A parachute then opens, slowing the car down with an acceleration of -5.40 m/s2. How fast is the racer moving 3.75 102 m after the parachute opens
*January 31, 2010 by james*

**Physics help please**

suppose you have 2 cars, and the larger one is twice as massive as the smaller one. If you and a friend push on them so that their accelerations are equal, how must the forces applied to the cars compare? a. the force on the larger car is equal to that on the smaller car. b. ...
*November 27, 2011 by Kristin*

**physics**

A railroad car with a mass of 2.35 104 kg moving at 3.90 m/s collides and joins with two railroad cars already joined together, each with the same mass as the single car and initially moving in the same direction at 1.25 m/s. a) What is the final speed of the three joined ...
*March 31, 2013 by Jacqueline*

**Physics **

A railroad car with a mass of 2.33 104 kg moving at 3.71 m/s collides and joins with two railroad cars already joined together, each with the same mass as the single car and initially moving in the same direction at 1.44 m/s.What is the final speed of the three joined cars ...
*January 19, 2015 by Chris *

**Calculus**

Two points P and Q are connected by a straight road of length d. At time t = 0, a car starts driving from P to Q at a constant speed c. At t = 0, a bee starts flying from Q toward the car at a constant speed b > c, and takes a zig-zagging path, reversing direction each time...
*September 6, 2014 by Robert*

**Physics **

When certain a force is applied to a 2kg standard mass, its acceleration is 5m/s^2.When the same force is applied to another object its aceleration is 2m/s^2. The mas of the objects is:
*May 3, 2011 by Britni*

**college physics**

A block of weight = 35.0 N sits on a frictionless inclined plane, which makes an angle theta = 27.0 with respect to the horizontal. A force of magnitude = 15.9 N, applied parallel to the incline, is just sufficient to pull the block up the plane at constant speed. What is Wg, ...
*February 25, 2010 by Anonymous*

**Physics**

A block of weight = 25.0 N sits on a frictionless inclined plane, which makes an angle = 34.0 with respect to the horizontal, as shown in the figure. A force of magnitude F= 14.0 N, applied parallel to the incline, is just sufficient to pull the block up the plane at constant ...
*October 17, 2010 by Eden*

**physics**

A particle's constant acceleration is south at 2.1 m/s2. At t = 0, its velocity is 42.6 m/s east. What is the magnitude and direction of its velocity at t = 7.6 s?
*January 21, 2010 by Sandhya*

**Physics**

A particle's constant acceleration is south at 2.1 m/s2. At t = 0, its velocity is 45.2 m/s east. What is its velocity at t = 7.7 s? What's the magnitude and direction?
*February 7, 2010 by Max*

**Physics**

A particle's constant acceleration is south at 2.1 m/s2. At t = 0, its velocity is 45.2 m/s east. What is its velocity at t = 7.7 s? What's the magnitude and direction?
*February 11, 2010 by Max*

**physics**

A particle's constant acceleration is south at 2.4 m/s2. At t = 0, its velocity is 43.4 m/s east. What is its velocity at t = 8.0 s? What is the magnitude and direction?
*February 14, 2010 by jimmy*

**physics**

Please Help.... A car (mass = 1170 kg) is traveling at 43 m/s when it collides head-on with a sport utility vehicle (mass = 2460 kg) traveling in the opposite direction. In the collision, the two vehicles come to a halt. At what speed was the sport utility vehicle traveling?
*October 26, 2010 by baily*

**physics**

A car (mass=1100kg) is traveling at 32m/s when it collides head on with a sport utility vehicle (mass=2500kg) traveling in the opposite direction. In the collision, the two vehicles come to a halt. at what speed was the sport utility vehicle traveling.
*March 12, 2012 by Natasha*

**physics**

A car (mass=1100kg) is traveling at 32m/s when it collides head on with a sport utility vehicle (mass=2500kg) traveling in the opposite direction. In the collision, the two vehicles come to a halt. at what speed was the sport utility vehicle traveling.
*March 12, 2012 by Natasha*

**Physics**

You are traveling in a convertible with the top down. The car is moving at a constant velocity 27.7 m/s, due east along flat ground. You throw a tomato straight upward at a speed of 12.8 m/s. How far has the car moved when you get a chance to catch the tomato? I do not ...
*September 10, 2010 by Chaz *

**physics**

A cart is driven by a large propeller or fan, which can accelerate or decelerate the cart. The cart starts out at the position x = 0 m, with an initial velocity of + 3.3 m/s and a constant acceleration due to the fan. The direction to the right is positive. The cart reaches a...
*January 28, 2014 by Anonymous*

**MATH**

A car is towing a trailer along a horizontal straight road using a horizontal tow-bar. The masses of the car and trailer are 1050kg and 200kg respectively. The resistance to motion of the car is 850N and the resistance to motion of the trailer is 150N. i) At an instant when ...
*October 26, 2013 by Math Only For The Brave*

**Physics**

A semitrailer is coasting downhill along a mountain highway when its brakes fail. The driver pulls onto a runaway-truck ramp that is inclined at an angle of 10.0 above the horizontal. The semitrailer coasts to a stop after traveling 137 m along the ramp. What was the truck's ...
*October 20, 2012 by Elizabeth*

**12th grade (physics)**

a car with bad shock absorbers bounces up and down with a period of 0.731s after hitting a bump. The car has a mass of 1850kg and is supported by four springs of equal force constant k. Determine a value for k. Answer in units of N/m. if you can, could you explain how to get ...
*October 28, 2010 by April*

**Physics- Elena please help!**

A large grinding wheel in the shape of a solid cylinder of radius 0.450m is free to rotate on a frictionless, vertical axle. A constant tangential force of 180 N applied to its edge causes the wheel to have an angular acceleration of 0.870 rad/s2. (a) What is the moment of ...
*November 6, 2012 by Anonymous*

**Physics**

A machine swings a mass of 1kg connected to a massless rope in a vertical circle so that the speed of them mass is constant at 8 m/s. The rope is 1.0 m long, and the center of the circle is fixed at all times. a) Find the acceleration of the mass with magnitude and direction ...
*November 12, 2013 by Robin*

**Physics B**

A car slows down from 23 m/s to rest in a distance of 85m. What is its constant acceleration? I got -6.224, but a friend was telling me it's -3.11 and that I had to divide by 2. Why is that?
*September 12, 2009 by Bob*

**Physical Science**

A race car goes around a level, circular track with a diameter of 1km at a constant speed of 90 km/h. What is the centripital acceleration?
*September 5, 2011 by Jill*

**Algebra**

Jim's Brakes charges $25 for parts and $55 per hour to fix the brakes on a car. Myron's Auto charges $40 for parts and $30 per hour to do the same job. What length of job in hours would have the same cost on both shops?
*January 28, 2010 by brooke*

**algebra**

Jims Brakes charges $25 for parts and $55 per hour to fix the brakes on a car. Myrons Auto charges $40 for parts and $30 per hour to do the same job. What length of job in hours would have the same cost on both shapes?
*January 28, 2010 by brooke*

**Physics**

(a) Calculate the magnitude of the gravitational force exerted on a 488-kg satellite that is a distance of 1.95 times earth radii from the center of the earth. (b) What is the magnitude of the gravitational force exerted on the earth by the satellite? (c) Determine the ...
*October 4, 2012 by Donald*

**Physics**

(a) Calculate the magnitude of the gravitational force exerted on a 430-kg satellite that is a distance of 2.81 times earth radii from the center of the earth. (b) What is the magnitude of the gravitational force exerted on the earth by the satellite? (c) Determine the ...
*December 12, 2012 by shine*

**physics**

A car (mass = 1150 kg) is traveling at 26.7 m/s when it collides head-on with a sport utility vehicle (mass = 2030 kg) traveling in the opposite direction. In the collision, the two vehicles come to a halt. At what speed was the sport utility vehicle traveling? Include units.
*July 11, 2013 by rodney*

**physics**

A car is moving down a street at 51 km/h. A child suddenly runs into the street. If it takes the driver 0.97 s to react and apply the brakes, how many meters will the car have moved before it begins to slow down?
*October 3, 2010 by mike*

**physics**

A car is moving down a street at 51 km/h. A child suddenly runs into the street. If it takes the driver 0.62 s to react and apply the brakes, how many meters will the car have moved before it begins to slow down?
*October 23, 2012 by miranda*

**Physics**

A car is moving down a street at 67 km/h. A child suddenly runs into the street. If it takes the driver 1.26 s to react and apply the brakes, how many meters will the car have moved before it begins to slow down?
*February 6, 2014 by Jake*

**science**

When the front of a 5.0 m long bus traveling at a constant speed of 20 m/s is 55 m away from an intersection, the traffic light turns yellow. It will take 3.0 s before the traffic light turns red. The drivers reaction time is 0.25 s. The bus can accelerate up to 2.0 m/s2 or ...
*July 27, 2014 by Nica*

**maths - two dimensional motion**

The problem I am trying to solve is from AQA Mechanics M1 and is as follows: An object is moving in a plane. At time t=0, it is at the origin, O, and moving with velocity u. After 2 seconds it is at A where OA = -2i - 4j. After a further 3 seconds it is at B where AB = 10i - ...
*April 9, 2013 by Maggie*

**science**

you and your brother are pushing a car with a dead battery. You exert forces of 20n and 25n in the same direction. What is the force applied on the car?
*September 17, 2014 by kirrah*

**PHYSICS**

A curve in a road forms part of a horizontal circle. As a car goes around it at constant speed 14.0 m/s, the total force exerted on the driver has magnitude 115 N. What are the magnitude and direction of the total vector force exerted on the driver if the speed is 25.0 m/s ...
*January 18, 2010 by Laila*

**Physics**

A 1596 kg car traveling at 24.91 m/s skids to a halt. What is the change in the combined thermal energy of the car and the road surface?
*September 28, 2011 by Joe*

**Physics**

A 1596 kg car traveling at 24.91 m/s skids to a halt. What is the change in the combined thermal energy of the car and the road surface?
*September 29, 2011 by Joe*

**algebra**

If a car leaves a skid mark of 500 feet, how fast was the car traveling? Using the formula r=25L
*April 23, 2012 by Coach*

**physics**

If the coefficient of friction between the tires of a car and the road is 0.101, what is the minimum stopping distance of a car traveling at 78.4 km/hr?
*September 29, 2012 by Demis*

**Physics**

Suppose a 1,600 kg car is traveling at 20.0 m/s. What average force is needed to stop the car in 4.0 s? Can you explain to me how you got your answer, thank you.
*February 16, 2013 by Demere*

**Physics**

A 12,000kg railroad car traveling at 12.0m/s couples with an identical car sitting on the tracks. What is the speed of the joined card?
*April 22, 2014 by Shon*

**Physics**

A driver brings a car traveling at 22m/s to a full stop in 2 seconds. How fast does the car uniformly decelerate?
*September 14, 2014 by Spencer*

**Gen. physics**

A cart is driven by a large propeller or fan, which can accelerate or decelerate the cart. The cart starts out at the position x = 0 m, with an initial velocity of +6.4 m/s and a constant acceleration due to the fan. The direction to the right is positive. The cart reaches a ...
*July 2, 2013 by ODU*

**Physics**

A Ferris wheel with radius 14.0 m is turning about a horizontal axis through its center, as shown in the figure below. The linear speed of a passenger on the rim is constant and equal to 6.60 m/s. What is the magnitude of the passenger's acceleration as she passes through the ...
*September 19, 2006 by Julie*

**Physics**

A car with good tires on a dry road can decelerate at about 5.0m/s/s when braking. If the car is traveling at 55miles/hour, how much time does it take the car to stop? 55 mph = 80.7 ft/s = 24.6 m/s Divide the initial speed by the deceleration rate to get the time required. (24...
*September 18, 2006 by Savannah*

**physics**

A roller-coaster car has a mass of 1100 kg when fully loaded with passengers. As the car passes over the top of a circular hill of radius 20 m, its speed is not changing. (a) At the top of the hill, what is the normal force (using the negative sign for the downward direction) ...
*March 9, 2013 by physics*

**College Physics **

A rifle bullet with a mass of 17.5 g traveling toward the right at 293 m/s strikes a large bag of sand and penetrates it to a depth of 23.6 cm. Determine the magnitude and direction of the friction force (assumed constant) that acts on the bullet.
*October 9, 2012 by JB*

**Physics**

A 5kg package is lifted vertically through 10m at constant speed. What is the potential energy of the package if acceleration due to gravity is 10m5 to power negative 2
*June 2, 2015 by Annah*

**physics**

A 450 g block is at rest on a horizontal surface. The coefficient of static friction between the block and the surface is 0.670, and the coefficient of kinetic friction is 0.380. A force of magnitude P pushes the block forward and downward as shown in the figure below. Assume ...
*October 17, 2011 by carlton*

**physics**

A 3.24 kg block located on a horizontal frictionless floor is pulled by a cord that exerts a force F=11.8N at an angle theta=23.0degrees above the horizontal, as shown. What is the magnitude of the acceleration of the block when the force is applied?
*January 28, 2012 by Rachel *

**physics**

a large bus and a van, both moving with a velocity of magnitude v, have a head-on-collision and both the vehicles stop after the collision. if the time of the collision is 1 sec then, a) which vehicle experiences smaller force of impact? b) which vehicle experiences the ...
*June 7, 2013 by h*

**College Physics**

In designing rotating space stations to provide for artificial-gravity environments, one of the constraints that must be considered is motion sickness. Studies have shown that the negative effects of motion sickness begin to appear when the rotational motion is faster than ...
*October 2, 2010 by Dawn*

** science**

A 3.00-g bullet traveling horizontally at 500 m/s hits a 4.8-kg wooden block, which is initially at rest on a smooth horizontal table. The bullet buries itself in the block without passing through. The speed of the block after the collision is:
*August 16, 2015 by haddad*

**math (stats)**

For a car traveling 30 mph in normal conditions, the distance required to brake to a stop is normally with a mean of 50 feet and a standard deviation of 8. you are traveling in a area at 30 mph and a car swerves into your path at a distance of 60 feet away. what is the ...
*November 17, 2014 by sarah*