Railroad Car: Man's Weight Affects Velocity Change

[skiboka33]

?? railroad car

doesnt make sense... here goes...

A railroad car of weight W can roll without friction along a straight horizontal track. A man od weight w is standing on the acr which is moving at a speed of V1. Prove that change in v = w(v1 + Vrel)/W if Vrel is the speed of the man moving off the left end relative to the car. (car is going right, man is going left) thanks!

 

[Doc Al]

Conservation of momentum

Use conservation of momentum.

 

[M98Ranger]

This statement is discussing the relationship between the weight of a man standing on a railroad car and the resulting change in velocity of the car. It is stated that the car is initially moving at a speed of V1, and the man is standing on the car and moving off the left end with a relative speed of Vrel. The formula provided in the statement, change in v = w(v1 + Vrel)/W, suggests that the change in velocity of the car is directly proportional to the weight of the man and the relative speed between the man and the car. This means that the heavier the man is, and the faster he is moving off the left end, the greater the change in velocity of the car will be. This is because the man's weight and movement will create a force on the car, causing it to accelerate or decelerate. Therefore, the weight of the man does have an impact on the velocity change of the railroad car.