JEE Main Physics question
A body of mass m₁ is moving with a velocity V. It collides with another stationary body of mass m₂. They get embedded. At the point of collision, the velocity of the system [DCE 1999, DCE 2001]
Answer: (B)
Solution
By momentum conservation: m₁V + m₂(0) = (m₁+m₂)v ⟹ v = [m₁/(m₁+m₂)]V, which is less than V (since m₂ > 0) but not zero.