Question

The two diagrams show the situation before and after a collision between two spheres A and B of equal radii moving along the same straight line on a smooth horizontal surface. The coefficient of restitution e is –

• A. $\frac{2}{3}$
• B. $\frac{1}{2}$
• C. $\frac{1}{3}$
• D. $\frac{1}{4}$

Answer 1

Answer: (B)

$\frac{1}{2}$

Answer 2

e = $\frac{v_{2}–v_{1}}{u_{1}–u_{2}}$ = $u_{1} = 8m/s,v_{1} = 2m/s$$$u_{2} = 2m/s,v_{2} = 5m/s$$