train problem

Classical Mechanics Level 2

Two ends of a train moving with uniform acceleration passes a certain point with velocities 36 kmph and 72 kmph. what is the velocity with which the middle point of the train passes the same point in kmph?


The answer is 56.9.

Vivek Vijayan by vivek vijayan , 26, India

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2 solutions

Vf²-Vi²=2aS > aS=Vf²-Vi²/2 > Vfmedio²=Vi²+2aS/2

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Ameya Ballal
Sep 2, 2014

let length be L. 72^2-36^2 = 2 a L
x^2-36^2= 2 a L/2 therefore x= 56.92(approx)

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