Question

A bullet of mass 0.1 kg is fired with a speed of 100 m/sec, the mass of gun is 50 kg. The velocity of recoil is

• A. 0.2 m/sec
• B. 0.1 m/sec
• C. 0.5 m/sec
• D. 0.05 m/sec

Answer 1

Answer: (A)

0.2 m/sec

Answer 2

According to principle of conservation of linear momentum, $m_{G}v_{G} = m_{B}v_{B}$

$\Rightarrow$ $v_{G} = \frac{m_{B}v_{B}}{m_{G}} = \frac{0.1 \times 10^{2}}{50} = 0.2m ⥂ / ⥂ s$