A ball of mass 
moves with speed 
and it strikes normally with a wall and is reflected back normally. If its time of contact with wall is 
, then find force exerted by ball on the wall.
A
B
C
mvt
D
Text Solution
Verified by ExpertsThe correct answer is:
A
Initial velocity of a ball 
When ball strikes the wall normally it is reflected back,
then final velocity 
Change in velocity 
Force exerted by the ball on the wall is given by Newton's second law,
i.e., 
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