Question

A gun fires a bullet of mass 50 gm with a velocity of . Because of this the gun is pushed back with a velocity of $1 m \mathrm { sec } ^ { - 1 }$ . The mass of the gun is

• A. 15 kg
• B. 30 kg
• C. 1.5 kg
• D. 20 kg

Answer 1

Answer: (C)

1.5 kg

Answer 2

$m _ { G } = \frac { m _ { B } v _ { B } } { v _ { G } }$ $\frac { 50 \times 10 ^ { - 3 } \times 30 } { 1 } = 1.5 \mathrm {~kg}$