A pendulum consists of a 2.0 kg stone swinging on a 4.0 mstring of negligible mass. The stone has a speed of 8.0 m/s when itpasses its lowest point.
a.) What is the speed when the string is at 60 degrees to thevertical?
b.) What is the greatesr angle with the vertical that thestring will reach during the stone's motion?
c.) If the potential energy of the pendulum- earth system istaken to be zero at the stone's lowest path, what is the total mechanical energy of the system?