Work Energy And Power Question 86

Question: A body of mass ?M? collides against a wall with a velocity v and retraces its path with the same speed. The change in momentum is (take initial direction of velocity as positive) [EAMCET 1982]

Options:

A) Zero

B) 2Mv

C) Mv

D) ? 2 Mv

Show Answer

Answer:

Correct Answer: D

Solution:

Change in momentum $ =m{{\vec{v}}_2}-m{{\vec{v}}_1} $

$ =-mv-mv=-2mv $



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