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A machine gun fires n bullets per second...

A machine gun fires n bullets per second with speed u, and mass of each bullet is m. If bullets hit a wall and rebounds with same speed, then force acting on the wall is

A

`nm u `

B

`2nm u`

C

`4nm u`

D

`(nm u)/(2)`

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Knowledge Check

  • A machine gun fires n bullets per second each of mass m . If the speed of each bullet is v, then the force of recoil is

    A
    mvn
    B
    mng
    C
    mnvg
    D
    `(mnv)/g`

  • A machine gun fires six bullets per second into a target. The mass of each bullet is 3 g and the speed 500 m/s. The power delivered to the bullets is

    A
    1.5 kW
    B
    2.25 kW
    C
    0.75 kW
    D
    375 W

  • If , a machine gun fires n bullets per second each with kinetic energy K, then the power of the machine gun is

    A
    `nK^(2)`
    B
    `(K)/(n)`
    C
    `n^(2)K`
    D
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