Wednesday

November 25, 2015
Number of results: 68,963

**physic**

Consider a train that rounds a curve with a radius of 570m at a speed of 160 km/h (approximately 100 mi/h)Calculate the friction force needed on a train passenger of mass 75kg if the track is not banked and the train does not tilt.
*July 6, 2013 by mert*

**Physics**

A skater with an initial speed of 5.90 m/s stops propelling himself and begins to coast across the ice, eventually coming to rest. Air resistance is negligible. (a) The coefficient of kinetic friction between the ice and the skate blades is 0.125. Find the deceleration caused ...
*March 14, 2014 by Elle*

**Algebra**

How long does it take a care traveling 100 mph to catch up to a car traveling 80 mph
*May 27, 2012 by Al*

**Physics**

A 100 lb block of ice slides down an incline 5.0 ft long and 3.0 ft high. A worker pushes up on the ice parallel to the incline so that it slides down at constant speed. The coefficient of friction between the ice and the incline is 0.10. Find (a) the force exerted by the ...
*March 11, 2015 by Emily*

**Physics**

A 100 lb block of ice slides down an incline 5.0 ft long and 3.0 ft high. A worker pushes up on the ice parallel to the incline so that it slides down at constant speed. The coefficient of friction between the ice and the incline is 0.10. Find (a) the force exerted by the ...
*March 11, 2015 by Emily*

**Physics**

A 100 lb block of ice slides down an incline 5.0 ft long and 3.0 ft high. A worker pushes up on the ice parallel to the incline so that it slides down at constant speed. The coefficient of friction between the ice and the incline is 0.10. Find (a) the force exerted by the ...
*March 12, 2015 by Emily*

**math**

a train 280m long .its speed is 60 km per hour. then ,how much time it will take to cover220m long platform?
*June 12, 2011 by reena*

**Physics**

A passenger on a train traveling 90km/h on a straight, level track notes that it takes another train (180 m long and moving with constant velocity) 4.0s to pass by. What is the velocity of that passing train relative to the ground? **please include explanation** thnx!!
*July 1, 2008 by David*

**physics**

a train slows down from 104m/s to 76m/s with constant decceleration in 440m. 1) what is the acceleration of the train? 2) how long does it take the train to travel this distance? 3) plot the position, velocity and acceleration of the train during this time interval as a ...
*September 14, 2011 by arty*

**algebra**

The speed of train A is 6 mph slower than the speed of train B. Train A travels 230 miles in the same time it takes train B to travel 260 miles. Find the speed of each train?
*March 10, 2010 by kathy*

**math**

The speed of a train A is 8mph slower than the speed of train B. Train A travels 230 miles in same time it takes train B to travel 270 miles. Find the speed of each train.
*April 21, 2010 by Karen*

**Algebra**

The speed of train A is 6 mph slower than the speed of train B. Train A travels 200 miles in the same time it takes train B to travel 230 miles. Find the speed of each train?
*July 11, 2010 by Jacqueline*

**math**

the speed of a train a is 6 mph slower than the speed of train b. train a travels 220 miles in the same time it takes train b to travel 250 miles. find the speed of each train
*August 19, 2010 by summer*

**Physics**

How to solve/ work this problem? If a curve with a radius of 88m is perfectly banked for a car traveling 75 km/h, what must be the coefficient of static friction for a car not to skid when traveling at 95km/h?
*February 21, 2011 by Emily Grossman*

**Physics**

A car moves with a speed v on a horizontal circular highway turn of radius is R = 100. Assume the height of the car’s center of mass above the ground is h = 1 m, and the separation between its inner and outer wheels (car's width) is w = 2 m. The car does not skid (static ...
*March 20, 2011 by William*

**physics**

Two banked curves have the same radius. Curve A is banked at an angle of 11°, and curve B is banked at an angle of 17°. A car can travel around curve A without relying on friction at a speed of 18.5 m/s. At what speed can this car travel around curve B without relying on ...
*February 16, 2012 by Blake*

**Physics**

Two banked curves have the same radius. Curve A is banked at an angle of 11°, and curve B is banked at an angle of 16°. A car can travel around curve A without relying on friction at a speed of 18.5 m/s. At what speed can this car travel around curve B without relying on ...
*November 7, 2012 by Don*

**Physics**

Two banked curves have the same radius. Curve A is banked at an angle of 11°, and curve B is banked at an angle of 16°. A car can travel around curve A without relying on friction at a speed of 18.5 m/s. At what speed can this car travel around curve B without relying on ...
*November 7, 2012 by Don*

**algebra**

when will train b catch up with train b if train a is traveling 60 mph and passes station at 1:25pm While train b is traveling 80 mph and passes staion at 1:40pm?
*March 30, 2011 by kia*

**Physics**

A 1500 kg car is turning around an arc of radius 20 m at a constant speed of 30 mph without slipping. What is the friction force the ground exerts on the car?
*March 21, 2011 by James*

**rotations2**

A hollow cylinder (hoop) is rolling on a horizontal surface at speed v = 1.85 m/s when it reaches a 23.5° incline.How far up the incline will it go? How long will it be on the incline before it arrives back at the bottom?
*March 11, 2010 by Anonymous*

**physics**

A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 24 degrees below the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes are defective. The car rolls from rest down the incline with a constant acceleration ...
*October 9, 2007 by rachel*

**physic**

A pig slides down a 29° incline in twice the time it would take to slide down a frictionless 29° incline. What is the coefficient of kinetic friction between the pig and the incline?
*October 26, 2014 by Dina*

**MAT/116**

I have been looking for a formula to do an equation with " Train A and Train B, I need to find out when Train B will catch Train A. Trian A is traveling at 40 miles per hour, train B is traveling at 48 miles per hour. Train A passes a station at 8:10p.m.. If Trian B passes the...
*August 12, 2010 by Marilynn*

**physics**

A solid ball of radius b and mass m is released from the top of an incline of the incline is at the height h above the ground. If the ball rolls without slipping, what willl be its linear speed when it reaches the botton of the incline?
*November 25, 2011 by pakilina*

**physics**

What is the minimum work needed to push a 850 kg car 940 m up along a 9.5 degree incline? Part A: Ignore Friction Part B: Assume the effective coefficient of friction retarding the car is 0.20.
*March 3, 2010 by Justin*

**physics**

a 65 kg object is pulled at a constant velocity up an incline w/ a force of 95 N parallel to the incline. Assuming that the difference between the work output and input is work required to overcome friction, what is the force of friction along the incline (the length of the ...
*April 8, 2011 by Jun*

**Physics**

Two banked curves on a highway have the same radius. Curve A is banked at 13 degrees and highway B is banked at 19 degrees. A car can travel around curve A without relying on friction at a speed of 18 m/s. At what speed can this car travel around curve B without relying on ...
*November 27, 2012 by Scott*

**Math**

8. A mile-long train is moving at 60-miles-per-hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through? 9. How many 3-cent stamps are there in 4 dozen?
*October 17, 2012 by KeKe*

**mathematics**

Train L and Train M leave a station at the same time heading in opposite directions. Train L is going north at an average speed of 70 miles per hour (mph). Train M is going south at an average speed of 85 mph. How long does it take each train, in hours, to travel 225 miles ...
*February 8, 2011 by derp*

**Physics**

A block is released from rest at the top of an incline which makes a 30 degree angle with the horizontal. The incline is 12 m long and it takes the block 25 seconds to reach the bottom. What is the coefficient of kinetic friction, between the block and the incline?
*February 24, 2011 by Emily*

**physics**

A block is released from rest at the top of an incline which makes a 30 degree angle with the horizontal. The incline is 12 m long and it takes the block 25 seconds to reach the bottom. What is the coefficient of kinetic friction, between the block and the incline?
*October 16, 2012 by Jacob*

**Physics I**

You are conducting an experiment inside a train car that may move horizontally along rail tracks. A load is hung from the ceiling on a string. The load is not swinging, and the string is observed to make a constant angle of with the horizontal. No other forces are acting on ...
*September 29, 2010 by Anonymous*

**Math help**

9). Hooke’s Law. The distance d when a spring is stretched by a hanging object varies directly as the weight w of the object. If the distance is 29 cm when the weight is 4 kg what is the distance when the weight is 9 kg? 10). Find the variation constant and an equation of ...
*May 28, 2010 by jim*

**Physics**

A box is sliding up an incline that makes an angle of 15.0 degrees with respect to the horizontal. The coefficient of kinetic friction between the box and the surface of the incline is 0.180. The initial speed of the box and the surface of the incline is 1.50 m/s. How far does...
*December 8, 2012 by Matoro*

**math algebra**

Trains A and B are traveling in the same direction on parallel tracks. Train A is traveling at 80 miles per hour and train B is travleing at 100 miles per hour. Train A pases a station at 3:20. If train B passes the same station at 3:35 pm, at what time will train B cathc up ...
*January 26, 2010 by chica*

**physics**

015 (part 1 of 2) 10.0 points A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 21 below the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes are defective. The car rolls from rest down the incline with a...
*September 23, 2011 by Lydia*

**sphy011**

a speedster traveling at a constant speed of 120 km/h passes a waiting police car which immediately starts from rest with a constant acceleration of 2.5 m/s^2.how long will it take the police car to catch the speedster?what is the distance that the speedster would have travel ...
*March 11, 2015 by tebogo*

**physics**

A train travels at a constant speed around a curve of radius 225 m. A ceiling lamp at the end of a light cord swings out to an angle of 20.0º throughout the turn. Draw a free body diagram? What is the speed of the train?
*November 20, 2012 by Courtney *

**Physics**

A block is released from rest at the top of an incline which makes a 30 degree angle with the horizontal. The incline is 12m long and it takes the block 25 seconds to reach the bottom. What is the coefficient of kinetic friction, µk, between the block and the incline?
*February 25, 2015 by Nate*

**Physics**

A boy is whirling around a stone tied at the end of a 0.71 m long string at constant angular speed of 4 revolutions per second in a plane perpendicular to the ground. The string breaks when it is making an angle of 54 degrees above the horizontal and the stone is on the way up...
*November 27, 2009 by Lola*

**physics**

In the 1950s, an experimental train that had a mass of 3.30 104 kg was powered across level track by a jet engine that produced a thrust of 4.90 105 N for a distance of 600 m. (a) Find the work done on the train. 1 J (b) Find the change in kinetic energy. 2 J (c) Find the ...
*May 10, 2012 by dan*

**physics**

a train starts from rest and accelerates uniformly to achieve a velocity of 20m/sec in 10 sec.then train maintains this speed for next 200 sec.the breaks are then applied and train comes to rest in next 50 sec.calculate a)acceleration in first 10 sec. b)acceleration in last 50...
*May 28, 2012 by parul*

**physics**

a train starts from rest and accelerates uniformly to achieve a velocity of 20m/sec in 10 sec.then train maintains this speed for next 200 sec.the breaks are then applied and train comes to rest in next 50 sec.calculate a)acceleration in first 10 sec. b)acceleration in last 50...
*May 30, 2012 by parul*

**physics**

a train starts from rest and accelerates uniformly to achieve a velocity of 20m/sec in 10 sec.then train maintains this speed for next 200 sec.the breaks are then applied and train comes to rest in next 50 sec.calculate a)acceleration in first 10 sec. b)acceleration in last ...
*May 30, 2012 by PLZ HELP ME NOW...*

**Physics**

An engine pulls a train of 20 frieght cars each having a mass of 5.0*10^4 kg with a constant force. The cars move from rest to a speed of 4.5 m/s in 19.7s on a straight track. Neglecting friction, the force with which the tenth car pulls the eleventh one (at the middle ofthe ...
*January 29, 2010 by James*

**Physics**

It takes a force of 53kN on the lead car of a 16-car passenger train with mass 9.1x 10^5 kg to pull it atconstant 45 m/s on level tracks. (a) What power must the locomotive provide to the lead car? (b) How much more power to the lead car than calculated in pan (c) Would be ...
*March 23, 2015 by Ben *

**physics**

A certain car is capable of accelerating at a rate of 0.57 m/s^2.How long does it take for this car to go from a speed of 56 mi/h to a speed of 66 mi/h? 1mi/h = 0.447 m/s.Answer in units of s
*September 3, 2012 by selena*

**physics**

A speeder passes a police car while traveling 130km/h. the police car imediently starts to accelerate at 10m/s^2 until the police car catches up to the speeder. how long does it take the police car to catch up?
*February 23, 2011 by Ty*

**Physics(Please help)**

1) A box is sliding up an incline that makes an angle of 14.0 ° with respect to the horizontal. The coefficient of kinetic friction between the box and the surface of the incline is 0.176. The initial speed of the box at the bottom of the incline is 3.72 m/s. How far does the ...
*May 29, 2012 by Hannah*

**algebra**

please tell me if these are right. Soybean meal is 12% protein, cornmeal is 6% protein. How many pounds of each should be mixed together in order to get 240-lb. mixture that is 11% protein? 80 pounds soybean and 160 pounds of cornmeal Trains A and B are traveling in the sme ...
*August 5, 2011 by babs*

**Physics**

A car is being driven along a country road on a dark and rainy night at a speed of 20 m/s. The section of road is horizontal and straight. The driver sees that a tree has fallen and covered the road ahead. Panicking, the driver locks the breaks at a distance of 20m from the ...
*November 6, 2011 by Anne*

**physics**

In a test run, a certain car accelerates uniformly from zero to 17 m/s in 2.95s. a.) what is the magnitude of the car's acceleration? b.) how long does it take the car to change it's speed from 8.5m/s to 17m/s? c.) will doubling the time always double the change in speed?
*February 3, 2013 by george*

**Science**

A certain car is capable of accelerating at a rate of + 0.60 m/s^2. How long does it take for this car to go from a speed of 55 mi/h to a speed of 60 mi/h?
*September 20, 2009 by Anh*

**physics**

A certain car is capable of accelerating at a rate of +0.90 m/s2. How long does it take for this car to go from a speed of 55 mi/h to a speed of 80 mi/h?
*September 1, 2010 by Anonymous*

**physics**

A certain car is capable of accelerating at a rate of +0.50 m/s2. How long does it take for this car to go from a speed of 45 mi/h to a speed of 85 mi/h?
*September 14, 2010 by j*

**physics**

A certain car is capable of accelerating at a rate of +0.90 m/s2. How long does it take for this car to go from a speed of 35 mi/h to a speed of 70 mi/h?
*September 15, 2010 by J*

**Physics **

A certain car is capable of accelerating at a rate of +0.90 m/s2. How long does it take for this car to go from a speed of 50 mi/h to a speed of 65 mi/h?
*September 17, 2010 by Raequel *

**physics**

A certain car is capable of accelerating at a rate of +0.60 m/s2. How long does it take for this car to go from a speed of 20 mi/h to a speed of 65 mi/h?
*September 21, 2010 by Bill*

**physics**

A certain car is capable of accelerating at a rate of 0.59 m/s2. How long does it take for this car to go from a speed of 27 mi/h to a speed of 33 mi/h?
*August 31, 2011 by Anonymous*

**physics**

A certain car is capable of accelerating at a rate of + 0.30 m/s2. How long does it take for this car to go from a speed of 55 mi/h to a speed of 80 mi/h?
*September 9, 2011 by Savy *

**physics**

A certain car is capable of accelerating at a rate of + 0.80 m/s2. How long does it take for this car to go from a speed of 15 mi/h to a speed of 75 mi/h?
*September 7, 2012 by Tamera*

**physics**

a driver of a car traveling at 15.6 m/s applies the brakes causing a uniform deceleration of 2.1 m/s squared. how long does it take the car to accelerate to a final speeed of 10.9 m/s. answer in units of seconds
*September 18, 2011 by jane *

**Earth and Physical Science**

A 901 kg car is traveling north down a country road when a deer crosses in front of the car. By slamming on the breaks, the care is able to decelerate at 4.0 meters per second squared. What is the frictional force between the street and the car?
*February 7, 2011 by Caitlin*

**Physics !!**

3)A car increases its speed from 5 m/s to 35 m/s in a distance of 75 m a)what is the acceleration of the car? b)How long did it take the car to travel the 75 m? someone PLEASE help me willyah!
*June 10, 2012 by Anonymous*

**Physics**

A car is traveling at 72 km/hr. The driver begins to apply the brakes and the begins to slow with a constant acceleration (a). After the brakes are applied, the car stops in a distance of 100 m. What is the acceleration? My teacher gave the class a list of formulas but didn't ...
*September 23, 2014 by Angie*

**physics**

How long does it take an automobile traveling in the left lane at 60.0 km/h to overtake (become even with) another car that is traveling in the right lane at 40.0 km/h when the cars’ front bumpers are initially 100 m apart?
*September 26, 2007 by Anonymous*

**physics**

How long does it take an automobile traveling in the left lane of a highway at 65.0 km/h to overtake (become even with) another car that is traveling in the right lane at 40.0 km/h when the cars' front bumpers are initially 80 m apart?
*September 8, 2010 by Anonymous*

**physics**

a block moves up 45degree incline w/ constant speed under the action of a force of 15n applied parallel to the incline.If the coefficient of kinetic friction is 0.3, determine the weight of the block and minimum force required to allow the block to move down the incline at ...
*March 6, 2014 by kmae*

**Physics - Force**

A high-speed maglev train is traveling with a changing velocity. what can be said about the forces acting on the train? Thanks!
*September 24, 2014 by Tim*

**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**

A car of mass 1600 kg is traveling without slipping on a flat, curved road with a radius of curvature of 38 m. If the car's speed is 15 m/s, what is the frictional force between the road and the tires?
*October 23, 2010 by john*

**Physics**

A car of mass 1670 kg is traveling without slipping on a flat, curved road with a radius of curvature of 34 m. If the car's speed is 14 m/s, what is the frictional force between the road and the tires?
*May 20, 2012 by Alex*

**Physics**

A car of mass 1670 kg is traveling without slipping on a flat, curved road with a radius of curvature of 34 m. If the car's speed is 14 m/s, what is the frictional force between the road and the tires?
*May 21, 2012 by Alex*

**trig**

two trains leave Kansas City at the same time. Train A is traveling due north at 55 mph, train B is traveling west at the rate of 65 mph. Find the distance between the two trains two hours later and the bearing of train B from train A.
*October 16, 2012 by Anonymous*

**Physics**

A very large roller coaster has an initial hill that has an 85 m drop. Note that a roller coaster has no engine. After being pulled up the first hill by a chain the train moves along the track with only gravity, normal forces due to the track, friction and air drag acting on ...
*November 23, 2015 by Hermans*

**Physics**

A very large roller coaster has an initial hill that has an 85 m drop. Note that a roller coaster has no engine. After being pulled up the first hill by a chain the train moves along the track with only gravity, normal forces due to the track, friction and air drag acting on ...
*November 23, 2015 by Anonymous*

**Dynamics**

During a high-speed chase, a 2400-lb sports car traveling at a speed of 100 mi/h just loses contact with the road as it reaches the crest A of a hill. a) Determine the radius of curvature r of the vertical profile of the road at A. b) Using the value of r found in a part a), ...
*March 24, 2011 by Sarah*

**Physics**

Two cars are traveling along a straight line in the same direction, the lead car at 22 m/s and the other car at 34 m/s. At the moment the cars are 59 m apart, the lead driver applies the brakes, causing the car to have a deceleration of 1.5 m/s 2 . How long does it take for ...
*September 25, 2011 by Grey*

**Physics**

On a dry road, a car with good tires may be able to brake with a constant deceleration of 4.17 m/s2. (a) How long does such a car, initially traveling at 22.4 m/s, take to stop? (b) How far does it travel in this time?
*March 9, 2011 by john*

**physics**

On a dry road, a car with good tires may be able to brake with a constant deceleration of 3.31 m/s2. (a) How long does such a car, initially traveling at 28.2 m/s, take to stop? (b) How far does it travel in this time?
*March 10, 2011 by john*

**Physics**

A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 22◦ below the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes are defective. The car rolls from rest down the incline with a constant acceleration ...
*October 23, 2013 by John*

**physics 70**

A .275 kg. object is swung in a vertical circular path on a string .850 m. long. A) What are the forces acting on the ball at any point along this path? B) Draw free-body diagrams for the ball when it is at the bottom of the circle and when it is at the top. C) If its speed is...
*April 21, 2013 by Annette*

**physics**

A car of mass 1600 kg is traveling without slipping on a flat, curved road with a radius of curvature of 38 m. If the car's speed is 15 m/s, what is the frictional force between the road and the tires? in Newtons
*October 22, 2010 by john*

**College Physics**

How long does it take an automobile traveling in the left lane of a highway at 60.0 km/h to overtake (become even with) another car that is traveling in the right lane at 20.0 km/h when the cars' front bumpers are initially 75 m apart?
*July 5, 2010 by Austin*

**College Physics**

How long does it take an automobile traveling in the left lane of a highway at 60.0 km/h to overtake (become even with) another car that is traveling in the right lane at 20.0 km/h when the cars' front bumpers are initially 75 m apart?
*July 5, 2010 by Austin*

**Math **

How long does it take an automobile traveling in the left lane of a highway at 70.0 km/h to overtake (become even with) another car that is traveling in the right lane at 20.0 km/h when the cars' front bumpers are initially 110 m apart? s
*February 14, 2012 by anonymous*

**Physics**

Traveling at a speed of 22m/s, the driver of an automobile suddenly locks the wheels by slamming on the brakes. The coefficient of friction between the tires and the road is 0.68. How much time does it take for the car to come to a halt? As usual, ignore the effects of air ...
*November 9, 2014 by Anonymous *

**Physics**

A 1200-kg automobile is stolen by the notorious Physics joyriders known as “the centripetal gang”. The gang tests their grasp on Newtonian physics by cruising around a banked circular track of radius 1025 m. From previous ‘experiments’ the gang has discovered the car’s ...
*February 24, 2013 by Meder*

**physics**

A 220 N crate is pushed along the ground with a horizontal force. The coefficient of kinetic friction is 0.21 and the coefficient of static friction is 0.31. The crate moves at a constant speed of 4.1 m/s. a) Draw a free-body diagram for the crate. b) What is the size of the ...
*November 15, 2011 by Kelsey*

**math**

A consultant traveled 7 hours to attend a meeting. The return trip took only 6 hours because the speed was 10 miles per hour faster. What was the consultant's speed each way? Rachel earns $6000 less than twice as much as Tom. If their two incomes total $48,000, how much does ...
*May 28, 2007 by ashley-help please!*

**Physics**

A cyclist approaches the bottom of a gradual hill at a speed of 20 m/s. The hill is 4.4 m high, and the cyclist estimates that she is going fast enough to coast up and over it without peddling. Ignoring air resistance and friction, find the speed at which the cyclist crests ...
*February 25, 2008 by Zach*

**Physics**

A cyclist approaches the bottom of a gradual hill at a speed of 14 m/s. The hill is 4.0 m high, and the cyclist estimates that she is going fast enough to coast up and over it without peddling. Ignoring air resistance and friction, find the speed at which the cyclist crests ...
*February 25, 2008 by Peter*

**Physics ***HELP*****

please explain how you got the answer car A - 20m/s car B - 30m/s Assume that both cars are 5m long. Suppose that car B is 20m behind car A is attempting to overtake car A. How long will it take for car B to arrive 10m ahead of car A?
*July 3, 2008 by Tom*

**physics**

You are driving your car over a circular-shaped bump in the road that has a radius of curvature of 75.9 m. A)If the car is traveling at a constant speed of 18.3 m/s, calculate the apparent weight of your 56.1 kg passenger as you pass over the top of the bump. B)What is the ...
*February 22, 2014 by name 23*

**physics**

You are driving your car over a circular-shaped bump in the road that has a radius of curvature of 75.9 m. A)If the car is traveling at a constant speed of 18.3 m/s, calculate the apparent weight of your 56.1 kg passenger as you pass over the top of the bump. B)What is the ...
*February 22, 2014 by Tammie*

**PHYSICS**

A train traveling at a constant speed rounds a curve of radius 200 m. A chandelier suspended from the ceiling swings out to an angle of 17.0° throughout the turn. What is the speed of the train? Again, use your formulas. Simple plug-n-chug with radial/angular force.
*October 9, 2006 by Ellie Mae*

**Physics **

I have 3 different questions. 1) Calculate the coefficient of kinetic friction if it takes a force of 64 Newtons to keep a 54 kilogram box of books sliding across any icy surface at a uniform speed. 2) A car weighing 14,000 Newtons rests on a 20.0 degree incline. Calculate the...
*October 6, 2010 by Dorothy*

**AP Physics**

A frictionless plane is 13.1 m long and inclined at 39.8 deg;. A sled starts at the bottom with an initial speed of 4.99 m/s up the incline. When the sled reaches the point at which it momentarily stops, a second sled is released from the top of the incline with an initial ...
*October 13, 2012 by Elise Brown*

**Dynamics**

a 1500 kg automobile is traveling up to 20 degree incline at a speed of 6 m/s. if the driver wishes to stop his car in a distance of 5m, determine the frictional force at pavement which must be supplied by rear wheels
*July 30, 2012 by DHilsath*