A soldier with a machine gun, falling from an airplane gets detached f

1.	A soldier with a machine gun, falling from an airplane gets detached from his parachute. He is able to resist the downward acceleration if the shoots 40 bullets a second at the speed of 500 m/s. If the weight of a bullet is 49 gm, what is the weight of the man with the gun ? Ignore resistance due to air and assume the acceleration due to gravity g = 9.8 ms–2 - (A) 50 kg (B) 75 kg (C) 100 kg (D) 125 kg
Answer» Correct Option :- (C) 100 kg Explanation :- To nullify the downward acceleration (M_m + M_g) 9.8 = 40 × 500 × 49 × 10^–3 ⇒ (M_m + M_g) = 100 kg

A soldier with a machine gun, falling from an airplane gets detached from his parachute. He is able to resist the downward acceleration if the shoots 40 bullets a second at the speed of 500 m/s. If the weight of a bullet is 49 gm, what is the weight of the man with the gun ? Ignore resistance due to air and assume the acceleration due to gravity g = 9.8 ms–2 - (A) 50 kg (B) 75 kg (C) 100 kg (D) 125 kg

Answer»

Correct Option :- (C) 100 kg

Explanation :-

To nullify the downward acceleration

(M_m + M_g) 9.8 = 40 × 500 × 49 × 10^–3

⇒ (M_m + M_g) = 100 kg

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