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Questions  

A ball of mass m moves with speed v and it strikes normally with a wall and reflected back normally, if its time of contact with wall is t then find force exerted by ball on wall

a
2mvt
b
mvt
c
mvt
d
mv2t

detailed solution

Correct option is A

For exerted by ball on wall = rate of change in momentum of ball =mv−(−mv)t=2mvt

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