A 2 kg object moving with a velocity of $4 \mathrm{~m} / \mathrm{s}$ collides with a stationary obje

Question

A 2 kg object moving with a velocity of $4 \mathrm{~m} / \mathrm{s}$ collides with a stationary object of mass 3 kg . After the collision, both objects move together. What is their common velocity?

Professor PC Thomas Classes · Answer

Conservation of momentum: $m_1 v_1 + m_2 v_2 = (m_1 + m_2)V \Rightarrow 2 	imes 4 + 3 	imes 0 = 5V \Rightarrow V = 1.6 \mathrm{~m/s}$.