Question

In an experiment using a linear air track a 0.5kg rider travelling to the right at 2m/s collides with a stationary rider of mass 1kg find the velocities of the two riders after collision if it is perfectly elastic

Answer 1

$$v_1=\frac{0.5-1}{0.5+1}2=-0.67\frac{m}{s}$$

$$v_2=\frac{2(0.5)}{0.5+1}2=1.33\frac{m}{s}$$