A ball is suspended by a thread of length l at the point O on an incline wall as shown. The inclination of the wall with the vertical is (a)the thread is displacement througha small angle away from the vertical and (b) the ball is released. Find the period of obcillation of pendulum. Consider both cases
a. `alpha gt beta`
b. `alpha lt beta`
Assuming that any impact between the wall and the ball is elastic.