A small rock with mass .12kg is fastened to a massless string withlength 0.80 m to form a pendulum. The pendulum is swinging so as tomake a maximum angle of 45* with vertical. Air resistance is negligible.
a) What is the speed of the rock when the string passes through the vertical position?
b) What is the tension in the string when it makes an angle of 45*with a vertical?
c) What is the tension in the string as it passes through thevertical?