Question

A simple pendulum is suspended from a peg on a vertical wall. The pendulum is pulled away from the wall to a horizontal position and released (see figure). The bob hits the wall, the coefficient of restitution being $2/ \sqrt{5}$.What is the minimum number of collisions after which the amplitude of oscillations becomes less than $60^{o}$ .

Answer 1

ઊએજઊટણઞટચઞણડઞડજઐડજઞઓઓઞએચએચએએટઞટચણઞડઞડજઞઓટઙઊઙઉજઐડઞજઓટણઞડઞજઊચચઊટજઞઓ