Question

A gun fires a bullet of mass 50 gm with a velocity of 30 metre per sec. Because of this the gun is pushed back with a velocity of 1 metre per sec . The mass of the gun is

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

Answer 1

The correct option is C

1.5 kg

$m_G=\frac{m_s{v}_s}{v_G}\frac{50\times {10}^{-3}\times 30}{1}=1.5kg$