Work Energy And Power Question 312

Question: A ball of mass m moving with velocity V makes a head-on elastic collision with a ball of the same mass moving with velocity 2V towards it. Taking direction of V, the positive velocities of the two balls after collision are

Options:

A) $ -V $ and 2V

B) 2V and $ -V $

C) V and $ -2V $

D) $ -2V $ and V

Show Answer

Answer:

Correct Answer: D

Solution:

[d] Initial velocities of balls are $ +V $ and $ -2V $ ,

respectively, and we know that for given condition velocities get interchanged after collision .

So the velocities of two balls after collision are $ -2V $ and V, respectively.



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