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July 25, 2014

Search: A train is traveling up a 5.0 incline at a speed of 2.20 m/s when the last car breaks free and begins to coast without friction. "How long does it take for the last car to come to rest momentarily?"

Number of results: 5,531

Physics
A train has a mass of 5.22 multiplied by 106 kg and is moving at 70.0 km/h. The engineer applies the brakes, which results in a net backward force of 1.87 multiplied by 106 N on the train. The brakes are held on for 37.0 s. (a) What is the new speed of the train? (b) How far ...
October 2, 2011 by Seth

Physics (pls help mr.bobpursley or drbob222)
A block is resting on top of a rough incline with coefficients of kinetic and static friction of 0.25 and 0.45 respectively. The angle of the incline is gradually increased until the block just begins to slip. How long will it take the block to slide to the bottom of the ...
September 16, 2013 by K

Physics
The block pictured below is sliding upward on the incline with theta=25. the coefficient of friction between the block and the incline is 0.15. of the block has a speed of 5 m/s at the bottom of the incline, how far upward will it slide before it stops? I've got a few ideas on...
October 30, 2012 by Alex Baker

Physics AP C
Two trains, each having a speed of 22 km/h, are headed at each other on the same straight track. A bird that can fly 60 km/h flies off the front of one train when they are 70 km apart and heads directly for the other train. On reaching the other train it flies directly back to...
August 26, 2009 by Steven

physics
A frictionless plane is 15m long and inclined at 39.8 degrees. A sled starts at the bottom with an initial speed of 6.46m/s up the incline. When it reaches the point at which it momentarily stops, a second sled is released from the top of this incline with an initial speed vi...
December 29, 2010 by sam

math
a locomotive is traveling at 120 mph. the engineers reaction time is 0.9 seconds how many feet will the train travel before the engineer recognises an emergency and applies the brake. A.265.ft B.260.ft C.160.ft D.165.ft.
September 27, 2010 by jamie

algebra
A train traveling at 460 watts from England by the circumference of the city of Wisconsin terminated an airspeed to ground rate ratio.In what city in France would the trains collide?
July 5, 2010 by Alan Zamora

cpcc
A frictionless plane is 10.0 m long and inclined at 33.0. A sled starts at the bottom with an initial speed of 4.30 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 speed ...
September 27, 2010 by thomas

Physics
A driver of a car that is going 25 m/s suddenly notices a train blocking the road. At the instant the brakes are applied, the train is 60 m away. The car decelerates uniformily and stikes the train 3 secs later. (a) How fast was the car moving on impact? (b) What was the ...
May 11, 2011 by Addie

Calculus
A train is heading due west from St. Louis. At noon, a plane flying horizontally due north at a fixed altitude of 4 miles passes directly over the train. When the train has traveled another mile, it is going 80 mph, and the plane has traveled another 5 miles and is going 500 ...
November 12, 2008 by George

Math
A train leaves the station at noon. The train is 180mi from its destination at 12:45PM and 90mi from the destination at 2:15PM. 1. How far is the station from the destination? 2. At what time will the train reach the destination?
January 23, 2014 by Beth

physics
A person looking out the window of a stationary train notices that raindrops are falling vertically down at a speed of 6.6 m/s relative to the ground. When the train moves at a constant velocity, the raindrops make an angle of θ = 36 when they move past the window as the...
September 6, 2010 by demi

physics
A person looking out the window of a stationary train notices that raindrops are falling vertically down at a speed of 8.1 m/s relative to the ground. When the train moves at a constant velocity, the raindrops make an angle of θ = 25 when they move past the window as the...
February 3, 2012 by Cody

College Physics 1
A person looking out the window of a stationary train notices that raindrops are falling vertically down at a speed of 6.17 m/s relative to the ground. When the train moves at a constant velocity, the raindrops make an angle of 25 when they move past the window, as the ...
September 20, 2013 by Autianna

Physics
A 975 N object is pulled at a constant velocity up an incline with a force of 327 N parallel to the incline as shown in the diagram. Assume that the difference between the work output and the work input is the work required to overcome friction. a) what is the force of ...
April 12, 2011 by Jeremy

physics
when any block slides down a smooth incline which is unfixed then the incline moves back.WHY??
February 21, 2010 by mohit

physics
A 11.0 box is released on a 37 incline and accelerates down the incline at 0.25 .What is the coefficient of kinetic friction?
October 15, 2010 by Anne

science
a train goes forward at a speed of 1m/s for 20 seconds. Then it stops abd goes backward at a speed od 0.5 m/s for 4 seconds. After both movements are completed, how far is the train located from its starting point.(note: we are asking for the train's final location, not the ...
March 22, 2011 by veronic

physics
A train is rounding a circular curve whose radius is 1.87E+2 m. At one instant, the train has an angular acceleration of 1.51E-3 rad/s2 and an angular speed of 0.0470 rad/s. Find the magnitude of the total acceleration (centripetal plus tangential) of the train.
March 16, 2012 by Katie

Physics
A train on a mountain railway is carrying 200 people of average mass 70kg up a slope at an angle of 30 to the horizontal and at a speed of 6.0 m s1. The train itself has a mass of 80 000 kg. The percentage of the power from the engine which is used to raise the passengers ...
June 8, 2014 by Me

math
Ellen works for a high-speed rail company that wants to develop a new rail line. Ellens project is to find a train that is the second fastest in the world. The Shinkansen Bullet Train in Japan is reported to go as fast as 320 kilometers per hour. The TGV train in France can ...
January 2, 2014 by Kayla

Physics 1
A mass of 17 kg is placed on a frictionless incline which is inclined at an angle of 59 degrees above the horizontal. It is held in place by a rope which is attached to a wall at the top of the incline. The rope is angled 17 degrees above the direction parallel to the incline...
September 30, 2011 by Jon

Physics
A mass of 11 kg is placed on a frictionless incline which is inclined at an angle of 69 degrees above the horizontal. It is held in place by a rope which is attached to a wall at the top of the incline. The rope is angled 13 degrees above the direction parallel to the incline...
October 5, 2011 by Tina

Physics
A block of mass m = 5.9 kg is pulled up a = 21 incline as in the figure with a force of magnitude F = 34 N. (a) Find the acceleration of the block if the incline is frictionless. 1 Your response differs from the correct answer by more than 10%. Double check your ...
October 7, 2011 by Imani

Physics
Two trains, each having a speed of s, are headed at each other on the same straight track. A bird that can fly at speed 2s flies off the front of one train when they are d apart and heads directly for the other train. On reaching the other train it flies directly back to the ...
February 5, 2014 by Robin

Science
Hello! I am having some trouble with this one question. I know that the Earth's gravitational force pulls the train towards the ground, but I do not know how the other forces act on the train. Any help is super appreciated:) Q: Explain how gravitational, electrical, and ...
May 31, 2014 by Amy

geometry
Deshawn built a model train car. The length of the model train car is 6 in. The scale Deshawn used to build the model train car is 1:36. What is the actual length of the train car in FEET?
December 2, 2013 by Elizabeth

advanced math
A train traveling at 460 watts from England by the circumference of the city of Wisconsin Rapids terminating an airspeed to ground rate ratio.In what city in France will the trains collide?
July 6, 2010 by Alan Zamora

Physics
A train traveling at a speed of 110km/h uniformly decelerates for 20 seconds. During that time it travels 450m a) what is the acceleration m/s square? b) what is its speed after the deceleration? (km/h) Could really use some help. Thank you.
January 1, 2014 by Danny

physics
A 3.00 kg block starts from rest at the top of a 36.0'> incline and slides 2.00 m down the incline in 1.60 s. (a) Find the acceleration of the block. m/s2 (b) Find the coefficient of kinetic friction between the block and the incline. (c) Find the frictional force acting on...
February 27, 2011 by Anonymous

physics
A 3.00 kg block starts from rest at the top of a 36.0'> incline and slides 2.00 m down the incline in 1.60 s. (a) Find the acceleration of the block. m/s2 (b) Find the coefficient of kinetic friction between the block and the incline. (c) Find the frictional force acting on...
February 27, 2011 by Anonymous

physics
A 3.00 kg block starts from rest at the top of a 36.0'> incline and slides 2.00 m down the incline in 1.60 s. (a) Find the acceleration of the block. m/s2 (b) Find the coefficient of kinetic friction between the block and the incline. (c) Find the frictional force acting on...
February 27, 2011 by Anonymous

Physics
A 3.00-kg block starts from rest at the top of a 33.5 incline and slides 2.00 m down the incline in 1.30 s. (a) Find the acceleration of the block. m/s2 (b) Find the coefficient of kinetic friction between the block and the incline. (c) Find the frictional force acting on the...
March 8, 2012 by Cindy

physics
A 3.00-kg block starts from rest at the top of a 27.5 incline and slides 2.00 m down the incline in 1.20 s. (a) Find the acceleration of the block. m/s2 (b) Find the coefficient of kinetic friction between the block and the incline. (c) Find the frictional force acting on the...
October 2, 2012 by monic

Physics
A 3.00-kg block starts from rest at the top of a 25.5 incline and slides 2.00 m down the incline in 1.75 s. (a) Find the acceleration of the block. m/s2 (b) Find the coefficient of kinetic friction between the block and the incline. (c) Find the frictional force acting on the...
October 23, 2013 by Anonymous

physics
a blockof mass 100 kg tied to a donkey that moves with constant accelaration of 20centimeter over second squared up a 30 degrees incline. what is the force with which the donkey pulls on the block parallel to the incline? The coefficient of kinetic friction between the kinetic...
May 4, 2010 by dai

Physics
In an electronics factory, small cabinets slide down a 30 degree incline a distance of 16 m along the incline to the next assembly stage. The cabinets have a mass of 10 kg each. Calculate the speed each cabinet would acquire if the incline were frictionless. What kinetic ...
November 17, 2011 by Brooke

Physics
At the train station, you notice a large horizontal spring at the end of the track where the train comes in. This is a safety device to stop the train so that it will not plow through the station if the engineer misjudges the stopping distance. While waiting, you wonder what ...
March 26, 2013 by Brandon

PHYSICS
At some amusement parks, to get on a moving "car" the riders first hop onto a moving walkway and then onto the cars themselves. Why is this done? If you are riding on a train that speeds past another train moving in the same direction on an adjacent track, it appears that the ...
October 13, 2010 by Danielle

physics
A mass of 11 kg is placed on a frictionless incline which is inclined at an angle of 69 degrees above the horizontal. It is held in place by a rope which is attached to a wall at the top of the incline. The rope is angled 13 degrees above the direction parallel to the incline...
October 6, 2011 by Kaleigh

PHYSICS HELP PLEASE !!!!!
A 21 kg object is placed on an incline with friction. The incline is raised slowly from zero degrees and at 60.71 degrees, the object begins to slide down the incline. What is the coefficient of static friction? Be as accurate as possible with your answer and be sure to enter ...
October 25, 2011 by Amanda

PHYSICS HELP PLEASE !!!!!
A 21 kg object is placed on an incline with friction. The incline is raised slowly from zero degrees and at 60.71 degrees, the object begins to slide down the incline. What is the coefficient of static friction? Be as accurate as possible with your answer and be sure to enter ...
October 25, 2011 by Amanda

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 0.50-kg block, starting at rest, slides down a 30.0 incline with kinetic friction coefficient 0.30 (the figure below). After sliding 84 cm down the incline, it slides across a frictionless horizontal surface and encounters a spring (k = 33 N/m). (a) What is the maximum ...
February 28, 2012 by Angel

physics
A 0.50-kg block, starting at rest, slides down a 30.0 incline with kinetic friction coefficient 0.30 (the figure below). After sliding 84 cm down the incline, it slides across a frictionless horizontal surface and encounters a spring (k = 33 N/m). (a) What is the maximum ...
February 29, 2012 by Angel

physics
Question Part Points Submissions Used 1 2 3 4 5 /5 /5 0/5 /5 2/2 0/10 0/10 1/10 0/10 2/10 Total 2/22 A block of mass m = 2.00 kg is released from rest at h = 0.400 m from the surface of a table, at the top of a θ = 35.0 incline as shown below. The frictionless incline...
October 19, 2011 by carlton

physics
A 23.0 kg box is released on a 39.0 incline and accelerates down the incline at 0.268 m/s2. Find the friction force impeding its motion.
March 1, 2011 by md8

physics
A 3 m, 250 N/m spring is at the bottom of a 10 m, 20 degree frictionless slope with a 30 m drop off the top of the incline. If a 10 kg wight is placed at the end of the spring when it is compressed 2 m, how fast will the block be traveling just before it hits the ground?
November 5, 2008 by Pursey

Physics
A 3 m, 250 N/m spring is at the bottom of a 10 m, 20 degree frictionless slope with a 30 m drop off the top of the incline. If a 10 kg wight is placed at the end of the spring when it is compressed 2 m, how fast will the block be traveling just before it hits the ground?
November 5, 2008 by Isaac

physics
A 1 kg object starts 3 meters from the ground on a 24 degree incline with a friction coefficient of 0.12. When it hits the ground, it collides and sticks to a 8 kg object. The coefficient friction on the horizontal surface is 0.24 How far do the objects travel away from the ...
December 21, 2008 by matt

Physics
How far x does it move down the incline before coming to rest? Suppose the incline is frictionless. The angle of inclination is 36 ◦ , the spring constant is 89.6 N/m the mass of the block is 9.05 kg and the acceleration of gravity is 9.8 m/s2 . Answer in units of m ...
January 5, 2014 by Name

Physics
How far x does it move down the incline before coming to rest? Suppose the incline is frictionless. The angle of inclination is 36 ◦ , the spring constant is 89.6 N/m the mass of the block is 9.05 kg and the acceleration of gravity is 9.8 m/s2 . Answer in units of m ...
January 5, 2014 by Alex

Physics
A 64.5-kg skier moving horizontally at 4.83 m/s encounters a 16.7 incline. a) How far up the incline will the skier move before she momentarily stops, ignoring friction? b) How far up the incline will the skier move if the coefficient of kinetic friction between the skies and...
February 20, 2011 by Em

physics
You are a member of an alpine rescue team and must get a box of supplies, with mass 3.00kg , up an incline of constant slope angle 30.0∘ so that it reaches a stranded skier who is a vertical distance 2.90m above the bottom of the incline. There is some friction present; ...
October 24, 2013 by HELP

Physics
A 69-kg skier moving horizontally at 4.1 m/s encounters a 21 incline. (a) How far up the incline will the skier move before she momentarily stops, ignoring friction? (b) How far up the incline will the skier move if the coefficient of kinetic friction between the skies and ...
June 1, 2012 by John

VHS
A ski starts from rest and slides down 22 degree incline 75 m long.If the coefficient of friction is .090 what is the ski's speed at the base of incline and if the snow is level at the foot of the incline and has the same coefficient of friction,how far will the ski travel ...
October 21, 2012 by SP

physics
There is a block on top of an incline plane. The incline is going down to the right. The angle to the right of the 90 is 36.9 degree. There is a force pushing on it from the left. Find the applied force (F) needed to prevent the block from sliding down the incline; ignore ...
June 26, 2011 by k9

Science
A train starts from rest and accelerates uniformly, until it has traveled 3000 m and acquired a velocity of 24 m/s. The train then moves a constant velocity of 24 m/s for 430 s. The train then decelerates uniformly at 0.065 m/s, until it is brought to a halt. 1. In Situation ...
August 21, 2013 by Brandon

physics
A man is 3/8th of the way across a railroad bridge when he hears a train coming. He knows that this passenger train cruises along at 60 MPH in this area. It turns out that he can run to either end of the bridge and jump off just ahead of the train. Assuming he runs a a ...
April 29, 2013 by Pam

physics
Two blocks, A and B (with mass 50 kg and 100 kg, respectively), are connected by a string. (one mass is on the incline, the other is hanging from the pullye) The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between block A and the incline ...
March 10, 2010 by Kelsey

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

science: physics
A 2.0 kg breadbox on a frictionless incline of angle is connected, by a cord that runs over a pulley, to a light spring of spring constant , as shown in Fig. 8-42. The box is released from rest when the spring is unstretched. Assume that the pulley is massless and ...
February 21, 2008 by gia

11th grade
A 16.0 kg box is released on a 39.0 incline and accelerates down the incline at 0.267 m/s2. Find the friction force impeding its motion
November 27, 2010 by Anonymous

Physics
Determine the acceleration of a 1500 kg automobile that rolls down an incline of 30 from the horizontal if a coefficient of friction between the tires and the incline is 0.12
June 10, 2014 by Corey Brown

algebra
It takes a passenger train 2 hours less time than it takes a freight train to make the trip from Central City to Clear Creek. The passenger train averages 96mi/hr while the freight train averages 64mi/hr. How far is it from Central City to Clear Creek?
November 11, 2012 by Samantha

Physics.
A mass of m1 = 12 kg is placed on an incline with an inclination angle of 50 degrees, a coefficient of kinetic friction of 0.16, and a coefficient of static friction of 0.89. m1 is tied to a rope which runs parallel to the incline and runs over a pulley to a hanging mass of m2...
October 21, 2011 by Amanda

algebra
A train left Podunk and traveled north at 75km/h. Two hours later, another train left Podunk and traveled in the same direction at 100 km/h. How many hours had the first train travelee when the second overtook it?
January 8, 2009 by joshua

Physics
A 90 m long train begins uniform acceleration from rest. The front of the train has a speed of 21 m/s when it passes a railway worker who is standing 184 m from where the front of the train started. What will be the speed of the last car as it passes the worker? (See Fig. 2-36.)
September 13, 2011 by Sydney

math
2 trains leave the same train station at the same time, one train travels northeast at 50 mph, the other train travels due west at 40 mph, how far apart are the trains after two hours
March 20, 2011 by Michael

Physics help pleaseeee
A horizontal spring with a spring constant of 200.0 N/m is compressed 25.0 cm and used to launch a 3.00 kg block across a frictionless surface. After the block travels some distance, the block goes up a 32 degree incline that has a coefficient of friction of 0.25 between the ...
November 16, 2011 by Me

Physics Help Please
A horizontal spring with a spring constant of 200.0 N/m is compressed 25.0 cm and used to launch a 3.00 kg block across a frictionless surface. After the block travels some distance, the block goes up a 32 degree incline that has a coefficient of friction of 0.25 between the ...
November 17, 2011 by Anonymous

math,correction
Problem #1 Number problem. If one-half of one integer is subtracted from three-fifths of the next consecutive integer, the difference is 3. What are the two integers? My answer is: the two integers are 24 & 25 Problem#2 Science and medicine. A passenger train can travel 325 mi...
March 7, 2007 by jas20

physics
A skier is gliding along at 1.13 m/s on horizontal, frictionless snow. He suddenly starts down a 13.1 incline. His speed at the bottom is 18.8 m/s. What is the length of the incline?
October 6, 2008 by Edna

physics
A block slides down a 10 angled incline at a constant speed. what is the coefficient of sliding friction between the blocks surface and the incline?
November 8, 2008 by kim

Physics
A skier is gliding along at 7.49 m/s on horizontal, frictionless snow. He suddenly starts down a 14.4 incline. His speed at the bottom is 28.5 m/s. What is the length of the incline?
October 4, 2010 by Bala

Physics
A skier is gliding along at 7.49 m/s on horizontal, frictionless snow. He suddenly starts down a 14.4 incline. His speed at the bottom is 28.5 m/s. What is the length of the incline?
October 4, 2010 by Bala

Physics
A skier is gliding along at 7.49 m/s on horizontal, frictionless snow. He suddenly starts down a 14.4 incline. His speed at the bottom is 28.5 m/s. What is the length of the incline?
October 4, 2010 by Bala

Physics
A skier is gliding along at 6.24 m/s on horizontal, frictionless snow. He suddenly starts down a 19.9 incline. His speed at the bottom is 23.3 m/s. What is the length of the incline?
October 5, 2010 by Anonymous

Physics
A skier is gliding along at 7.49 m/s on horizontal, frictionless snow. He suddenly starts down a 14.4 incline. His speed at the bottom is 28.5 m/s. What is the length of the incline?
October 5, 2010 by Bala

Physics
A skier is gliding along at 7.49 m/s on horizontal, frictionless snow. He suddenly starts down a 14.4 incline. His speed at the bottom is 28.5 m/s. What is the length of the incline?
October 5, 2010 by Bala

Physics
A solid sphere at rest at the top 12.0 m inclined plane rolls down the incline. How high vertically does it rise of the other incline?
December 19, 2010 by George

Physics
A skier is gliding along at 2.62 m/s on horizontal, frictionless snow. He suddenly starts down a 16.9 incline. His speed at the bottom is 18.4 m/s. What is the length of the incline?
January 25, 2011 by Jason

physics
A 5-kg box is released on a 30 degree incline and accelerates down the incline at 2.79 m/s^2. To the nearest tenth of a Newton, what is the friction force impeding its motion?
November 16, 2012 by Danielle

MATHS
Please help! Pedro and Alice raced two model trains along two straight tracks. Pedro's train travelled 7.5 cm every minute. Alice's train travelled 7.5 cm every second. How many centimeters had Alice's train travelled when Pedro's train had travelled 2.75 metres? Thank You
October 21, 2013 by SARAH

physics please help :/
A 0.50-kg block, starting at rest, slides down a 30.0 incline with kinetic friction coefficient 0.30 (the figure below). After sliding 84 cm down the incline, it slides across a frictionless horizontal surface and encounters a spring (k = 33 N/m). (a) What is the maximum ...
March 1, 2012 by Angel

Physics
A ski starts from rest and slides doen a 22 degree incline 75m long. a) if the coefficient of friction is 0.090, what is the ski's speed at the base of the incline? b). If the snow is level at the foot of the incline and has the same coefficient of friction, how far will the ...
February 23, 2011 by Emily Grossman

Physics
A 521 N box is sitting on a 33.5 incline. Find the force of gravity parallel (Fp) to the surface of the incline, and the force of gravity perpendicular to the surface of the incline (FN). a. If the coefficient of static friction is 0.227, find the Ff . b. Will the box slide ...
October 23, 2012 by MaKayla

Statistics
The turnover (in millions of pounds) for 8 train companies and 8 coach companies are given below. Train 4.3 13.2 134 88 92 66.5 122.1 102 Coach 2.2 31 44 72 19 89.3 55.9 43.1 (a)Using an appropriate statistical test determine whether train companies or coach companies have ...
August 17, 2011 by waqas

maths
THE RAILROAD TRACK BETWEEN TOWN A AND TOWN B IS 500 MILES LONG THE BLUE TRAIN IS SCHEDULED TO LEAVE TOWN A FOR TOWN B AT 2 P.M THE RED TRAIN IS SCHEDULED TO LEAVE TOWN B FOR TOWN A AT 3 P.M BUT IS DELAYED 95 MINUTES DUE TO ENGINE PROBLEM . IF THE BLUE TRAIN TRAVELS 35 MPH AND ...
March 22, 2013 by Anonymous

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 of mass m is placed in a smooth-bored spring gun at the bottom of the incline so that it compresses the spring by an amount x_c. The spring has spring constant k. The incline makes an angle theta with the horizontal and the coefficient of kinetic friction between the ...
March 13, 2011 by Trevor

physics
When the crampton coal-fired train engine was built in 1852 , its mass was 48.3t ( 1.0 t= 1.0*10^3) and its force capability was rated at 22.4 kN. Assuming it was pulling train cars whose total mass doubled its own was and the total friction on the engine and cars was 10.1 kN...
March 25, 2012 by Melissa

physics
When the crampton coal-fired train engine was built in 1852 , its mass was 48.3t ( 1.0 t= 1.0*10^3) and its force capability was rated at 22.4 kN. Assuming it was pulling train cars whose total mass doubled its own was and the total friction on the engine and cars was 10.1 kN...
March 25, 2012 by Melissa

math
at 1p.m. two trains, traveling towards each other, leave from towns that are 312 km apart. one train averages at most 82 km/h and the other at most 74 km/h. what is the earliest time for them to meet?
September 28, 2010 by Anonymous

math
A train travels at rate of 40 miles per hour for 3 hours. The train enigineer wants to make a trip back in 2 1/2 hours. Which equation can be used for r , the rate the train has to travel on the trip back? A. r= 40 x 3/2.5 B. r= 40 x 3 x 2.5 C. r= 40 x 2.5/3 D. r= 40 x 2.5
October 27, 2010 by Aly

math
a train traveled for 5 hours at a rate of 52 miles per hour..How far did the train travel?
February 15, 2011 by linda

Math
Altogether,Renee walks a combined "2 4/5" miles to and from the train each day.How long is the walk to the train?
December 12, 2013 by CeCe

probability
Q: A train and a bus arrive at random between 9AM and 10AM. The train stops for 10 minutes and bus for x minutes. Find x so that the bus and train will meet with probability of 0.5
February 7, 2014 by E V Shashank

physics
a 200 newtoon wagon is to be pulled up a a 30 degrees incline at constant speed. how large a force parallel to the incline is needed if friction are negligible?
August 12, 2013 by stieven

Physics
A skateboarder, with an initial speed of 2.6m/s , rolls virtually friction free down a straight incline of length 18m in 3.3 s. What angle is the incline plane?
October 8, 2013 by Whitney

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