JEE Main Physics question
A shell of mass 10 kg is moving with a velocity of 10 ms⁻¹ when it blasts and forms two parts of mass 9 kg and 1 kg respectively. If the 1st mass (9 kg) is stationary, the velocity of the 2nd is [WB-JEE 2008]
Answer: (C)
Solution
By momentum conservation, 10×10 = 9×0 + 1×v ⟹ v = 100 ms⁻¹.