a simple pendulum is made up of a 400-g mass attached to a 1.3-m string. it is pulled to right a distance of 10 cm and then released from rest at t=0.
A) what is its frequency of oscillation?
B) what is the maximum speed of the pendulum bob?
C) What is the acceleration of the pendulum at time t=19s
D) what is the speed of mass at time=19s?
E) what is the total energy of the system?