Question

I GIVE MEDALS.
A train rolls past a stationary observer. To him, the train is moving at a speed of 25 m/s west, and a woman on the train is moving at a speed of 24.6 m/s west. How long does it take the woman to move 4 m relative to the train?

A. 10 s
B. 9.0 s
C. 7.1 s
D. 8.4 s

Answer 1

velocity of woman relative to train = velocity of woman-velocity of train

so velocity of woman relative to train = 24.6-25.0=-0.4 m/s. (- sign indicates that woman walked opposite to the direction of train)

so the time taken will be equal to = distance (4m)/velocity (0.4)= 10 s.

so the answer is 10 seconds.

Answer 2

Thanks so much!

Answer 3

your welcome. :)

Answer 4

10