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physics

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a machine gun fires 10 bullets persecond into a target. each bullet weights 20 gm and had a speed of 1500 m per second .find the force neccessary to hold the gun in posotion?

  • physics -

    Average force = (momentum change)/time
    = (bullet mass) x velocity x (10/ second)

  • physics -

    10/s * .02 kg = .2 kg/s
    force = rate of change of momentum or m a
    = change in momentum per second
    = .2 kg/s * 1500 m/s
    = 300 kg m/s^2 = 300 Newtons

  • physics -

    300 Newton but how can solved

  • physics -

    300N

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