Question

A simple pendulum oscillates in a vertical plane. When it passes through the mean position, the tension in the string is `3` times the weight of the pendulum bob.what is the maximum displacement of the pendulum with respect to the vertical
A. `30^(@)`
B. `45^(@)`
C. `60^(@)`
D. `90^(@)`

Answer 1

Correct Answer - D
speed of the block at `B,v=sqrt(2gh)`
top complete the vertical circle, `vgesqrt(5gR)`
`sqrt(2ghgesqrt(5gR)`
`hge(5R)/(2),h_(min)=(5R)/(2)`