A machine gun fires 20 bullets per second at a target. Each bullet weighs 20 g and has a speed of 800 m/s. The force necessary to hold the gun in position is:Required to answer. Single choice.
320
800
1000
1200
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Answer:
320 is ur answer
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no of bullets =20(n)
weight of each bullet = 20g(m)
force×time = change in momentum
F × T = n × m (800-0)
F = 20 × 20/1000 × 800
F = 20×2×8
F= 320
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