A) \[\frac{2mv}{t}\]
B) \[\frac{mv}{t}\]
C) \[mvt\]
D) \[\frac{mv}{2t}\]
Correct Answer: A
Solution :
Initial velocity of ball\[=v\] When it strikes the wall normally and reflected back, then final velocity\[=-v\] Change in velocity \[=v-(-v)=2v\] Force exerted by the ball on the wall is given by Newtons second law, i.e., \[F=ma\] \[=\frac{m\Delta v}{\Delta t}\] \[=\frac{m(2v)}{t}\] \[=\frac{2mv}{t}\]You need to login to perform this action.
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