Question

a simple pendulumis released from rest at A as shown. if m is the mass of the bob and l is the length of the pendulum the gain in K E at B

Answer 1

Answer:

Initial energy =mgl

But, as per the given in question,

PE=0

gain in KE=mglcos30

KE=mgl

2

3

∴ option C is the correct solution

solution