A person holding a rifle (mass of person and rifle together
is 100 kg) stands on a smooth surface and fires 10 shots
horizontally, in 5 s. Each bullet has a mass of 10 g with a
muzzle velocity of 800 ms⁻¹. The final velocity acquired by
the person and the average force exerted on the person are
[NEET Kar. 2013]
(a) –1.6 ms⁻¹; 8 N (b) –0.08 ms⁻¹; 16 N
(c) – 0.8 ms⁻¹; 8 N (d) –1.6 ms⁻¹; 16 N
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Explanation:
the following situations, identify the agent exerting the force. Also, state
the effect of the force in each case.
(a) Squeezing a piece of lemon between the fingers to extract its juice.
(b) A person diving into a swimming pool.
(c) A labourer moving a loaded cart.
(0) A car coming to rest once its engine is switched
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