Given, Mass (m1) of bullet = 20 g = 0.02 kg
Mass (m2) of pistol = 2 kg
Initially bullet is inside the gun and it is not moving.
Mass = m1 + m2 = (0.02 + 2) kg = 2.02 kg
And u1 = 0
So, Initial momentum = 2.02 × 0 = 0 .....(i)
Finally let the velocity of pistol be v2 and v1 for bullet = 150
Final momentum = m1v1 + m2v2
= 0.02 × 150 + 2v2 ...(ii)
We know that
Initial momentum = Final momentum
