Homework Help: Physics

Posted by StressedStudent on Saturday, September 22, 2012 at 8:08pm.

A train consists of 50 cars, each of which has a mass of 7.2 × 103 kg. The train has an acceleration of +7.2 × 10-2 m/s2. Ignore friction and determine the tension in the coupling (a) between the 30th and 31st cars and (b) between the 49th and 50th cars.

s - bobpursley, Saturday, September 22, 2012 at 8:18pm
F=ma

so the tension in a coupling depends on the mass behind the coupling
In the case of the just last car,
tension=masscar*a

now between the 30and 31 car, there are 20 cars behind
tension=20(masscar)a

Answer this Question

Related Questions

dynamics, check my ans - Three identical train locomotives, on separate tracks, ...
physics - A train consists of 40 freight cars, each having a mass of 2.71 &...
physics - When the crampton coal-fired train engine was built in 1852 , its mass...
physics - When the crampton coal-fired train engine was built in 1852 , its mass...
Math - Train A and train B leave station going in opposite directions. Train B ...
Physics - An engine pulls a train of 20 frieght cars each having a mass of 5.0*...
physics - A toy train track is mounted on a large wheel that is free to turn ...
Physics - Find the speed at which Superman (mass=88.0 kg) must fly into a train...
Physics - Find the speed at which Superman (mass=88.0 kg) must fly into a train...
physics - The electric motor of a model train accelerates the train from rest to...

For Further Reading

First Name:
School Subject:
Answer: