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Physics
A body of mass m collides against a wall with the velocity v and rebounds with the same speed. Its magnitude of change of momentum is
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Q. A body of mass $m$ collides against a wall with the velocity $v$ and rebounds with the same speed. Its magnitude of change of momentum is
NTA Abhyas
NTA Abhyas 2022
A
$2m v$
B
$m v$
C
$\frac{1}{2}m v$
D
0
Solution:
Change in momentum
$\Delta p=p_{f}-p_{i}$
$\Delta p=mv-\left(- m v\right)$
$\Delta p=2mv$
