A small rock having mass of 0.22 kg is fastened to a mass less string having length of 0.70 m to form a pendulum. The pendulum is swinging so as to create a maximum angle of 45° with the vertical. Air resistance is very small.
(i) Determine the speed of the rock if the string passes via the vertical position?
(ii) Determine the tension in the string if it makes an angle of 45° with the vertical?
(iii) Determine the tension in the string as it passes via the vertical?