Question

A smooth steel ball strikes a fixed smooth steel plate at an angle q with the vertical. If coefficient of restitution is e, the angle at which the rebounce will take place is :

• A. q
• B. tan^–1$\left\lbrack \frac{\tan\theta}{e} \right\rbrack$
• C. e tan q
• D. tan^–1$\left\lbrack \frac{e}{\tan\theta} \right\rbrack$

Answer 1

Answer: (B)

tan^–1$\left\lbrack \frac{\tan\theta}{e} \right\rbrack$

Answer 2

v'cos a = evcos q

v' sina = vsin q

Ž a = tan^–1$\left( \frac{1}{e}\tan\theta \right)$