You are on a train traveling east at speed of 24 m/s with respect to the ground.

Question

You are on a train traveling east at speed of 24 m/s with respect to the ground.

1)

If you walk east toward the front of the train, with a speed of 3.2 m/s with respect to the train, what is your velocity with respect to the ground?

m/s east

2)

If you walk west toward the back of the train, with a speed of 3.2 m/s with respect to the train, what is your velocity with respect to the ground?

m/s east

3)

Your friend is sitting on another train traveling west at 25 m/s. As you walk toward the back of your train at 3.2 m/s, what is your velocity with respect to your friend?

m/s east

Explanation / Answer

(1)Vt= velocity of train=24 m/s

V= velocity of person=3.2 m/s

velocity with respect to ground Vt+ V= 24+3.2= 27.2 m/s east

(2)velocity with respect to ground Vt+ V= 24-3.2= 20.8 m/s east

(3)velocity with respect to friend= 3.2-25= -21.8 m/s west

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