The length of a simple pendulum is 0.75 m, the pendulum bob has a mass of 308 grams, and it is released at an angle of 15° to the vertical.
(a) With what frequency does it vibrate? Assume SHM.
(b) What is the pendulum bob's speed when it passes through the lowest point of the swing?
(c) What is the total energy stored in this oscillation, assuming no losses?