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.
