Question

A \( 3 kg \) ball falls from a height of \( 64 cm \) and rebounds to a height of \( 25 cm \). The coefficient of restitution is 

(1) \( \frac{25}{64} \)

(2) \( \frac{5}{8} \)

(3) \( \frac{64}{25} \)

(4) \( \frac{8}{5} \)

Answer 1

Correct option is (2) \(\frac {5}{8}\)

\(e = \sqrt {\frac {h _2}{h_1}}\)

\(e = \sqrt {\frac {25}{64}} = \frac {5}{8}\)