A 290-kg flatcar 25 m long is moving with a speed of 7.0 m/s along horizontal frictionless rails. A 80-kg worker starts walking from one end of the car to the other in the direction of motion, with speed 3.0 m/s with respect to the car. In the time it takes for him to reach the other end, how far has the flatcar moved?

Question

Magdalena Roth

Physics

11 June, 08:37

A 290-kg flatcar 25 m long is moving with a speed of 7.0 m/s along horizontal frictionless rails. A 80-kg worker starts walking from one end of the car to the other in the direction of motion, with speed 3.0 m/s with respect to the car. In the time it takes for him to reach the other end, how far has the flatcar moved?

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Mariam Navarro · Answer 1

Car is 25 m long. worker moves at speed 3.0 m/s with respect to the car

Time taken to reach the other end

= 25 / 3 = 8.333 s

Displacement of flatcar during this period

= 7 x 8.333

= 58.33 m