Saturday

September 20, 2014

September 20, 2014

Number of results: 53,802

**college gen. physics II**

38. A proton initially moves left to right long the ‑axis at a speed of 2 103 m/s. It moves into an electric field, which points in the negative direction, and travels a distance of 0.2 m before coming to rest. If the proton's mass and charge are 1.67 10‑27 ...
*July 25, 2010 by Alinkashia*

**physics**

1. A 10.0 g object moving to the right at 25.0 cm/s makes an elastic head-on collision with a 15.0 g object moving in the opposite direction at 36.0 cm/s. Find the velocity of each object after the collision. 10.0 g object: 15.0g object: 2. A dentist's drill starts from rest. ...
*July 7, 2008 by Elisa*

**physics**

A particle travels to the right at a constant rate of 6.5 m/s. It suddenly is given a vertical acceleration of 3.2 m/s2 for 3.9 s. What is its direction of travel after the acceleration with respect to the horizontal? Answer between −180 and +180. Answer in units of...
*June 16, 2011 by JRD*

**college physics**

A cylindrical stone column of diameter 2R = 1.47 m and height H = 4.46 m is transported in standing position by a dolly. When the dolly accelerates or decelerates slowly enough, the column stands upright, but when the dollys acceleration magnitude exceed a critical value ac, ...
*April 13, 2010 by eric*

**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 ...
*March 29, 2013 by Jman*

**physics 213**

A duck has a mass of 2.80 kg. As the duck paddles, a force of 0.120 N acts on it in a direction due east. In addition, the current of the water exerts a force of 0.190 N in a direction of 48.0 south of east. When these forces begin to act, the velocity of the duck is 0.120 m...
*February 3, 2012 by Erin*

**physics**

An automobile starts from rest and 110 ft attains a speed of 30 mi/h. In what time has it traveled this distance and the is the acceleration? -when is the acceleration of the object positive and negative?
*July 30, 2012 by zianna*

**Physics**

A car traveling at 10 m/s accelerates at 2.03 m/s2 for 11 seconds. To the nearest meter how far does it travel? To the nearest tenth of a m/s, what is the final velocity of the car in the previous problem?
*July 8, 2010 by Me*

**Physics**

A car traveling at 14 m/s accelerates at 2.11 m/s2 for 14 seconds. To the nearest meter how far does it travel? To the nearest tenth of a m/s, what is the final velocity of the car in the previous problem?
*January 24, 2012 by Julie*

**science**

A car traveling along the highway needs a certain amount of force exerted on it to stop. More stopping force may be required when the car has:
*February 20, 2013 by john*

**Physics**

A gun is fired and a 56g bullet is accelerated to a muzzle speed of 130m/s . Part A If the length of the gun barrel is 0.60m , what is the magnitude of the accelerating force? (Assume the acceleration to be constant.)
*September 24, 2013 by Joe*

**physics**

A boy on a motor scooter is traveling at a velocity of 14.1 m/s when he applies his brakes in order to stop. How much time will it take him to stop if he slows down at a rate of 3.2 m/s2?
*June 11, 2014 by roger*

**Physics**

San Francisco a very simple technique is used to turn around a cable car when it reaches the end of its route. The car rolls onto a turntable, which can rotate about a vertical axis through its center. Then, two people push perpendicularly on the car, one at each end. The ...
*March 21, 2007 by Mary*

**Physics**

A car accelerates at a constant rate from zero to 36.8 m/s in 10 seconds and then slows to 13.9 m/s in 5 seconds. What is its average acceleration to the nearest tenth of a m/s2 during the 15 seconds?
*July 8, 2010 by Me*

**physics**

A car accelerates at a constant rate from zero to 37.8 m/s in 10 seconds and then slows to 13.5 m/s in 5 seconds. What is its average acceleration to the nearest tenth of a m/s2 during the 15 seconds?
*October 6, 2011 by wes*

**Physics**

a car accelerates at a constant rate from zero to 26.7 m/s in 10 seconds and then slows to 19 m/s in 5 seconds. What is its average acceleration to the nearest tenth of a m/s^2 during the 15 seconds?
*January 13, 2012 by Jason*

**Physics**

A car accelerates at a constant rate from zero to 25.6 m/s in 10 seconds and then slows to 14.4 m/s in 5 seconds. What is its average acceleration to the nearest tenth of a m/s2 during the 15 seconds?
*January 24, 2012 by Julie*

**physics**

A car accelerates at a constant rate from zero to 20.5 m/s in 10 seconds and then slows to 15.9 m/s in 5 seconds. What is its average acceleration to the nearest tenth of a m/s2 during the 15 seconds?
*February 19, 2012 by moon*

**physics**

A car accelerates at a constant rate from zero to 28.7 m/s in 10 seconds and then slows to 17.5 m/s in 5 seconds. What is its average acceleration to the nearest tenth of a m/s2 during the 15 seconds?
*February 20, 2012 by r*

**Physics **

A car accelerates at a constant rate from zero to 23.3 m/s in 10 seconds and then slows to 15 m/s in 5 seconds. What is its average acceleration to the nearest tenth of a m/s^2 during the 15 seconds?
*August 28, 2013 by Jay*

**Physical Science**

1.Instantaneous speed is measured B. when the object reaches its destination. C. at a particular instant. D. over the duration of the trip. 2. A ball is rolled uphill a distance of 5 meters before it slows, stops, and begins to roll back. The ball rolls downhill 9 meters ...
*June 4, 2013 by Lanny*

**physics**

A jetliner, traveling northward, is landing with a speed of 72 m/s. Once the jet touches down, it has 730 m of runway in which to reduce its speed to 5.9 m/s. Compute the average acceleration (magnitude and direction) of the plane during landing (take the positive direction to...
*August 17, 2010 by yoyoma*

**physics**

A jetliner, traveling northward, is landing with a speed of 65 m/s. Once the jet touches down, it has 785 m of runway in which to reduce its speed to 5.0 m/s. Compute the average acceleration (magnitude and direction) of the plane during landing (take the positive direction to...
*September 7, 2010 by andrew*

**physics**

A jetliner, traveling northward, is landing with a speed of 65 m/s. Once the jet touches down, it has 785 m of runway in which to reduce its speed to 5.0 m/s. Compute the average acceleration (magnitude and direction) of the plane during landing (take the positive direction to...
*September 7, 2010 by bethany*

**physics**

A jetliner, traveling northward, is landing with a speed of 62 m/s. Once the jet touches down, it has 700 m of runway in which to reduce its speed to 5.6 m/s. Compute the average acceleration (magnitude and direction) of the plane during landing (take the positive direction to...
*September 23, 2011 by annmarie*

**Physics**

A jetliner, traveling northward, is landing with a speed of 67 m/s. Once the jet touches down, it has 765 m of runway in which to reduce its speed to 5.1 m/s. Compute the average acceleration (magnitude and direction) of the plane during landing (take the positive direction to...
*January 20, 2012 by Natasha*

**Physics**

A jetliner, traveling northward, is landing with a speed of 60 m/s. Once the jet touches down, it has 795 m of runway in which to reduce its speed to 5.6 m/s. Compute the average acceleration (magnitude and direction) of the plane during landing (take the positive direction to...
*January 24, 2014 by Maria*

**physics**

A runner circles a track of radius 50 m in 50 s moving at a constant rate. If the runner was initially moving north, what has been the runner's average acceleration when halfway around the track?
*June 11, 2010 by anonymous*

**Physics**

A low friction cart of mass m, traveling at speed v, collides (perfectly) elastically with a cart of triple the mass, initially at rest. What is the result of this collision? (What are the final, after-collision velocities?) Do NOT use the derived equations from the textbook. ...
*August 10, 2012 by Chad*

**Physics**

I don't really understand this aspect of physics yet, I need help understanding these problems. Problem One: Two particles, with identical positive charges and a separation of 2.00 10-2 m, are released from rest. Immediately after the release, particle 1 has an acceleration a1...
*August 31, 2007 by Jim*

**Physics**

A 2.6-kg object hangs at one end of a rope that is attached to a support on a railroad car. When the car accelerates to the right, the rope makes an angle of 7.5 with the vertical, as shown in the figure below. Find the acceleration of the car
*February 10, 2011 by Anonymous*

**Physics**

A 2.6-kg object hangs at one end of a rope that is attached to a support on a railroad car. When the car accelerates to the right, the rope makes an angle of 7.5 with the vertical, as shown in the figure below. Find the acceleration of the car
*February 10, 2011 by Anonymous*

**physics**

A car is driven 105 km west and then 30 km southwest. What is the displacement of the car from the point of origin (magnitude and direction)?
*September 21, 2009 by DJ*

**Physics**

A car is driven 135 km west and then 40 km southwest. What is the displacement of the car from the point of origin (magnitude and direction)?
*March 23, 2010 by Aastha*

**Physics**

A car is driven 135 km west and then 40 km southwest. What is the displacement of the car from the point of origin (magnitude and direction)?
*March 23, 2010 by Aastha*

**physics**

A car is driven 165 km west and then 25 km southwest. What is the displacement of the car from the point of origin (magnitude and direction)?
*September 26, 2010 by Carol*

**physics**

A car is driven 145 km west and then 65 km southwest. What is the displacement of the car from the point of origin (magnitude and direction)?
*December 4, 2010 by Anonymous*

**Physics**

A car is driven 145 km west and then 65 km southwest. What is the displacement of the car from the point of origin (magnitude and direction)?
*December 4, 2010 by Anonymous*

**physics**

A car is driven 30km west and then 80 km southwest. What is the displacement of the car from the point of origin (magnitude and direction)?
*January 23, 2012 by Anonymous*

**physics**

A car is driven 105 km west and then 65 km southwest. What is the displacement of the car from the point of origin (magnitude and direction)?
*September 30, 2012 by joe*

**Physics**

Will you check my work and help me with the last two problems please? A 4 kg ball has a momentum of 12 kg m/s. What is the ball's speed? -(12 kg/m/s) / 4kg=3m/s A ball is moving at 4 m/s and has a momentum of 48 kg m/s. What is the ball's mass? -(48kg/m/s) / (4m/s) =12 kg A 1-...
*October 14, 2007 by Soly*

**physics**

Will check my work and help me with the last two problems please? A 4 kg ball has a momentum of 12 kg m/s. What is the ball's speed? -(12 kg/m/s) / 4kg=3m/s A ball is moving at 4 m/s and has a momentum of 48 kg m/s. What is the ball's mass? -(48kg/m/s) / (4m/s) =12 kg A 1-kg ...
*October 15, 2007 by Soly*

**algebra**

Please I'm stuck!!!!! A person is driving a car on a straight road. The graph shows the distance in y miles that the individual is from home after x hours. the graph has the following points (1, 40) and (3, 90) Find the slope intercept of the line y = ____x + ______ How fast ...
*December 6, 2010 by Lee*

**physical science**

A small car with a weight of 2000 lb traveling at 30 mph can stop in about 100 ft. How far does it take for a large SUV weighing 8000 lb to stop if it is also traveling at 30 mph?
*December 15, 2011 by Fonda*

**physics**

A train slows down at a constant rate as it rounds a sharp circular horizontal turn. Its initial speed is not known. It takes 19.8 s to slow down from 81 km/h to 37 km/h. The radius of the curve is 164 m. As the train goes around the turn, what is the magnitude of the ...
*June 16, 2011 by JRD*

**Physics**

A car of mass = 1200 traveling at 60.0 enters a banked turn covered with ice. The road is banked at an angle , and there is no friction between the road and the car's tires.What is the radius of the turn if = 20.0 (assuming the car continues in uniform circular motion around ...
*April 6, 2011 by Brooke*

**physics**

If a force of 60 N is exerted on a 15 kg object, calculate the acceleration that the object undergoes. ________m/s(squared)
*June 14, 2012 by Leo*

**Physics**

An electron has an initial speed of 2.24 10^5 m/s. If it undergoes an acceleration of 2.2 10^14 m/s^2, how long will it take to reach a speed of 5.37 10^5 m/s
*September 15, 2014 by Antoine*

**Physics**

A chair with a mass of 21 kg is accelerated by a steady net force with a magnitude of 160 N. What is the magnitude of its acceleration?
*March 4, 2011 by Anonymous*

**math**

In order to pass a physical education class at a university, a student must run 1.0 mi in 12.5 min. After running for 10.0 min (assume constant speed), she still has 510 yd to go. What constant acceleration does she need over the final 510 yd in order to make it?
*September 14, 2014 by Charles*

**Physics**

A sled starts from rest at the top of a hill and slides down with a constant acceleration. At some later time it is 14.4 m from the top; 2.00 s after that it is 25.6 m from the top, 2.00 s later 40.0 m from the top, and 2.00 s later it is 57.6 m from the top. What is the ...
*September 1, 2010 by Ceci*

**Physics**

A dentist's drill starts from rest. After 3.30 s of constant angular acceleration it turns at a rate of 2.1 104 rev/min. (a) Find the drill's angular acceleration. rad/s2 (b) Determine the angle (in radians) through which the drill rotates during this period. rad
*October 6, 2011 by Allie*

**Physics**

A dentist's drill starts from rest. After 3.30 s of constant angular acceleration it turns at a rate of 2.1x10^4 rev/min. (a) Find the drill's angular acceleration. rad/s2 (b) Determine the angle (in radians) through which the drill rotates during this period. rad
*October 7, 2011 by Allie*

**physics**

A dentist's drill starts from rest. After 2.50 s of constant angular acceleration it turns at a rate of 3.0 104 rev/min. (a) Find the drill's angular acceleration. rad/s2 (b) Determine the angle (in radians) through which the drill rotates during this period. rad
*November 14, 2012 by monic*

**Physics**

A 2.90 kg block starts from rest at the top of a 30 incline and accelerates uniformly down the incline, moving 2.23 m in 1.90 s. a) Find the magnitude of the acceleration of the block. (b) Find the coefficient of kinetic friction between the block and the incline. (c) Find ...
*October 19, 2010 by Diana*

**Physics**

A 2.90 kg block starts from rest at the top of a 30 incline and accelerates uniformly down the incline, moving 2.23 m in 1.90 s. (a) Find the magnitude of the acceleration of the block. (b) Find the coefficient of kinetic friction between the block and the incline. (c) Find ...
*October 20, 2010 by Diana*

**physics**

A 3.00 kg block starts from rest at the top of a 30 incline and accelerates uniformly down the incline, moving 1.94 m in 1.70 s. (a) Find the magnitude of the acceleration of the block. (b) Find the coefficient of kinetic friction between the block and the incline. (c) Find ...
*March 10, 2011 by justin*

**physics**

A 9600 kg boxcar traveling at 15 m/s strikes a stationary second car. The two stick together and move off with a speed of 7.0 m/s. What is the mass of the second car?
*March 7, 2010 by Anonymous*

**physics**

7700-kg boxcar traveling 18m/s strikes a second car. The two stick together and move off with a speed of 5.0m/s. What is the mass of the second car?
*July 3, 2010 by muller*

**physics**

Two cars, A and B, are traveling in the same direction, although car A is 174 m behind car B. The speed of A is 25.6 m/s, and the speed of B is 18.6 m/s. How much time does it take for A to catch B?
*October 16, 2010 by megan*

**physical science**

a car traveling along the highway needs a certain amount of force exerted on it to stop.more stopping force may be required when the car has: ;
*February 4, 2011 by denise*

**Physics**

A 9500 kg boxcar traveling at 19 m/s strikes a stationary second car. The two stick together and move off with a speed of 10 m/s. What is the mass of the second car?
*February 1, 2012 by Davey*

**physics**

Two cars, A and B, are traveling in the same direction, although car A is 204 m behind car B. The speed of A is 22.9 m/s, and the speed of B is 18.6 m/s. How much time does it take for A to catch B?
*September 22, 2013 by help please*

**Physics**

A 1030 kg car is pulling a 360 kg trailer. Together, the car and trailer have an acceleration of 2.07 m/s2 directly forward. How do you find net force on the car and trailer?
*October 23, 2010 by James*

**PHYSICS**

You are driving a car down a straight road at a constant 48 miles per hour. Consider the following forces: I) air drag pushing back on the car; II) gravity pulling down on the car; III) the ground pushing up on the car; IV) friction pushing the wheels (and the car) forward; ...
*April 28, 2011 by Diana*

**physics**

A 1,660 kg car is parked on a hill with a slope of 8.0. Its brakes and transmission are locked in position to keep the car from rolling. The coefficient of static friction of the rubber tires on the asphalt road is 0.14. What is the force of static friction between the tires ...
*November 6, 2012 by anon*

**Physics**

A car of mass m moving at a speed v1 collides and couples with the back of a truck of mass 3m moving initially in the same direction as the car at a lower speed v2. (Use any variable or symbol stated above as necessary.) (b) What is the change in kinetic energy of the car...
*March 8, 2014 by Joe*

**Physics**

A car of mass m moving at a speed v1 collides and couples with the back of a truck of mass 3m moving initially in the same direction as the car at a lower speed v2. (Use any variable or symbol stated above as necessary.) (b) What is the change in kinetic energy of the car...
*March 10, 2014 by Joe*

**Physics**

A car of mass m moving at a speed v1 collides and couples with the back of a truck of mass 3m moving initially in the same direction as the car at a lower speed v2. (Use any variable or symbol stated above as necessary.) (b) What is the change in kinetic energy of the car...
*March 12, 2014 by Joe*

**physics**

I have another question for the problem below, so What is the speed of the car just before it lands safely on the other side? would it be the same 38.6 meters/sec A 10,000N car comes to a bridge during a storm and finds the bridge washed out. The 650-N driver must get to the ...
*June 4, 2013 by mike*

**physics**

I have another question for the problem below, so What is the speed of the car just before it lands safely on the other side? would it be the same 38.6 meters/sec A 10,000N car comes to a bridge during a storm and finds the bridge washed out. The 650-N driver must get to the ...
*June 4, 2013 by mike*

**physics**

I have another question for the problem below, so What is the speed of the car just before it lands safely on the other side? would it be the same 38.6 meters/sec A 10,000N car comes to a bridge during a storm and finds the bridge washed out. The 650-N driver must get to the ...
*June 4, 2013 by mike*

**physics**

A car P is moving with uniform speed of 5m/s towards a carriage of mass 9kg at rest kept on the rails at point B. the height of AC is 120m.cannon balls of 1kg are fired from the car with an initial velocity of 100m/s at an angle 30 degree with the horizontal.the first cannon ...
*January 16, 2011 by sreeram*

**physics**

A block of mass m is initially at rest at the top of an inclined plane with a height = 4.4 m which makes and angle of θ = 17 degrees with respect to the horizontal. It is observed to be traveling at v = 0.2 m/s a distance d after the end of the inclined plane as shown. ...
*October 7, 2013 by carlo*

**physics**

Proper design of automobile braking systems must account for heat buildup under heaving braking. Calculate the thermal energy dissipated from brakes in a 1460-kg car that descends a 15.5 hill. The car begins braking when its speed is 92 km/h and slows down to a speed of 28 km...
*February 14, 2011 by Johnathon*

**Physics**

Proper design of automobile braking systems must account for heat buildup under heaving braking. Calculate the thermal energy dissipated from brakes in a 1360-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 36 km...
*February 12, 2013 by Thomas*

**physics**

How many times as large a centripetal acceleration is required of a car rounding a curve at 45.1 MPH as for one rounding the same curve at 10.8 MPH? That is, what is the ratio of the centripetal acceleration required for the faster car to the same for the slower car?
*September 13, 2012 by honeybell*

**Physics**

A jetliner, traveling northward, is landing with a speed of 66.5 m/s. Once the jet touches down, it has 766 m of runway in which to reduce its speed to 13.1 m/s. Compute the average acceleration (magnitude and direction) of the plane during landing (take the direction of the ...
*December 13, 2011 by K*

**physics**

A jetliner, traveling northward, is landing with a speed of 65.7 m/s. Once the jet touches down, it has 817 m of runway in which to reduce its speed to 5.93 m/s. Compute the average acceleration (magnitude and direction) of the plane during landing (take the direction of the ...
*January 27, 2012 by Candy*

**Physics**

A child traveling 5m/s on a sled passes her younger brother.if her average acceleration on the sledding hill is 2m/s,how fast is she traveling when she passes her older brother 4s later.
*September 5, 2011 by rally*

**Physics**

A child is traveling 7 m/s on a sled when she passes her younger brother. Here avg acceleration is 2m/s2. How fast is she traveling shen she passes her older brother 6s later?
*September 12, 2012 by Anonymous*

**college physics**

Two blocks of masses m1 = 4.00 kg and m2 = 3.00 kg are placed in contact with each other on a frictionless horizontal surface. A constant force F = 9.00 N is applied to the block of mass m1. a) Determine the magnitude of the acceleration of the two-block system. b) Determine ...
*February 11, 2012 by lacrosse*

**Physics**

A wheel 1 meter in diameter is rotating at 100 revolutions per minute without slipping along a level stretch of road and passes mile marker 0 at 12:00 noon. it continues past mile marker 0 for 10 minutes and then has a period of angular acceleration of 2.5x10^-2 radians per ...
*February 22, 2012 by Maria*

**university**

Three equal negative point charges are placed at three of the corners of a square of side d. What is the magnitude of the net electric field at the center of the square? (k=1/4ϵ0=8.99~109N⋅m2/C2 ) Express your answer in terms of the variables d, q, and ...
*September 19, 2014 by zainab*

**physics**

. A ball, initially at rest at t= 0 seconds, rolls with constant acceleration down an inclined plane 10 meters long. If the ball rolls 1 meter in the first 2 seconds, how far will it have rolled at t= 4 seconds?
*November 8, 2011 by Anonymous*

**math**

a car depreciates in by avalue of $1000 per year. The original value of the car is $30,000. Let V(x) be the value of the car in x years. Write the linear function that represent the value of the car in x years. what will be the value of the car after 7 years?
*June 17, 2013 by kirk*

**Physics**

A cue ball traveling at 4.0 m/s makes a glancing, elastic collision with a target ball of equal mass that is initially at rest. The cue ball is deflected so that it makes an angle of 30 with its original direction of travel. (a) Find the angle between the velocity vectors of ...
*November 7, 2010 by Amy*

**science**

A cue ball traveling at 4.0 m/s makes a glancing, elastic collision with a target ball of equal mass that is initially at rest. The cue ball is deflected so that it makes an angle of 30 with its original direction of travel. (a) Find the angle between the velocity vectors of ...
*November 7, 2010 by Amy*

**Physics HELP HELP**

A cue ball traveling at 4.0 m/s makes a glancing, elastic collision with a target ball of equal mass that is initially at rest. The cue ball is deflected so that it makes an angle of 30 with its original direction of travel. (a) Find the angle between the velocity vectors of ...
*November 8, 2010 by matt*

**Physics**

The barrel of a rifle has a length of 0.916m. A bullet leaves the muzzle of a rifle with a speed of 621m/s. What is the acceleration of the bullet while in the barrel? A bullet in a rifle barrel does not have a constant acceleration, but constant acceleration is to be assumed ...
*September 14, 2012 by sam*

**Physics- impuse and force**

A car is moving to the right with a speed of 20 m/s. A large SUV is moving to the left at a speed of 20 m/s. The SUV has a mass three times that of the small car. They have an totally inelastic head-on collision in an intersection. There are two passengers in each vehicle, one...
*July 5, 2011 by Casey*

**physics help!**

The tires of a car make 63 revolutions as the car reduces its speed uniformly from 94.0 km/h to 58.0 km/h. The tires have a diameter of 0.88 m. What was the angular acceleration of each tire? And If the car continues to decelerate at this rate, how much more time is required ...
*March 25, 2010 by Anonymous*

**physics**

A car is driven 125km west and 65km southwest. What is the displacement of the car from the point of origin (magnitude and direction)?
*October 20, 2008 by Julia*

**Physics**

A 14000 kg railroad car travels alone on a level frictionless track with a constant speed of 24.0 m/s. A 6500 kg additional load is dropped onto the car. What then will be the car's speed?
*February 1, 2012 by Yaya*

**College Physics**

A particle experiences a constant acceleration that is north at 100 m/s^2. At t=0, its velocity vector is 60 m/s east. At what time will the magnitude of the velocity be 100 m/s?
*September 13, 2010 by Chelsea*

**Calculus, AntiDerivatives**

I need help with this problem: A car traveling at 43 ft/sec decelerates at a constant 5 ft per second squared. How many feet does the car travel before coming to a complete stop? I'm not sure where to start, i know how to find antiDerivatives, but i dont even know the equation...
*November 23, 2006 by Mike*

**maths**

a car is traveling at 100km/hr and rounds a slight curve to the right of 30 degrees. the driver hits a mailbox of 80kgs on the curb with the left front of his car. how far does the mailbox move and in what direction to the car's travel does it move. thank you for your help. p....
*December 26, 2011 by cisco*

**Physics**

A 69990 kg locomotive is traveling at 9.86 m/s when its engine and brakes both fail. How far will the locomotive roll before it comes to a stop? (The coefficient of rolling friction is 0.002.)
*January 22, 2013 by Student*

**algebra 2**

two cars leave an intersection. one car travels north; the other east. when the car traveling north had gone 15 miles, the distance between the cars was 5 mile more than the distance traveled by the car heading east.how far had the east bound car traveled?
*March 18, 2012 by amanda*

**calculus**

At a summer campfire, the radius of a marshmallow on a stick expands at the rate of \ {r ' (t)} = \frac{2.4 }{3 t + 6} mm/s where t is the time of heating in seconds. Initially the radius was 3.8 mm. Find the radius after 16 seconds using the following steps: When substituting...
*March 8, 2014 by Marcus*

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