A) \[2nmv\]
B) \[nmv\]
C) \[\frac{nmv}{2}\]
D) \[4nmv\]
Correct Answer: A
Solution :
Change in momentum of each ball\[=mv-(-mv)\] \[=2mv\] Time taken = 1 s So, \[{{F}_{av}}=\frac{total\text{ }change\text{ }in\text{ }momentum}{time\text{ }taken}\] \[=n\frac{2mv}{1}=2nmv\]You need to login to perform this action.
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