A pendulum of mass 0.25 kg and length L= 1.0 m is attached to a line which is fixed at point P, and makes an angle of 15 degrees with respect to the vertical. The mass rotates in a horizontal circle at constant speed of 1.5 m/s. Determine the following:
a) The force of tension in the line
b) The radius r of the circle the pendulum traces out.
c) The period and frequency of the motion.