1.

A machine gun fires `10` bullets per second in horizontal direction. Mass of each bullet is `80g` and muzzle velocity is `500m//s`. If the average horizontal force the shooter must apply to keep the machine gun stationary is `Fxx10^(2)N`, find numerical velue of `F`A. `4`B. `5`C. `8`D. `12`

Answer» Correct Answer - A
Ans. (1)
`F_(n et)=(DeltaAp)/(Deltat)=(nmv)/(t)=(10xx80xx500)/(1000xx1)=400N`


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