Question

A metal ball falls from a height of 32 metre on a steel plate. If the coefficient of restitution is 0.5, to what height will the ball rise after second bounce

• A. 2 m
• B. 4 m
• C. 8 m
• D. 16 m

Answer 1

Answer: (A)

2 m

Answer 2

$h _ { n } = h e ^ { 2 n }$ = $32 \left( \frac { 1 } { 2 } \right) ^ { 4 } = \frac { 32 } { 16 } = 2 m$ (here n = 2, e = 1/2)