The pendulum shown right has a mass of 0.26 kg and moves to the right from point B to point A. At point B the speed of the mass is 3.2 m/s.
(i) What is the change in the gravitational potential energy in the motion from B to A?
(ii) What is the mass speed at point A?
(iii) If the mass is increased to larger than 0.26kg, will the speed at point A INCREASE, DECREASE, or STAY THE
SAME?