Problem 1: The following gure is the position vs. time graph of a particle in simple harmonic motion. 25 xlcm} 4.5 -25 t{s) a) What is the phase angle :13? b} What is the angular velocity u)? c) Write an equation for this simple harmonic motion. d} Calculate the position(s) where the potential energy of the system is two times greater than the kinetic energy of the object. Problem 2: A clock pendulum oscillates at a frequency of 2.5 Hz. At t=0 s, it is released from rest starting at an angle of 12 to the vertical. Ignoring friction, calculate the linear speed ofthe bob when the pendulum is a) at 6 to the vertical. b} at 0 to the vertical