(a) A stone is thrown upwards from a point A , as shown in the figure. After reaching the highest point B it comes down. Explain the transformation of energy from A to B and B to A and also mention the type of energy possessed by the stone at points A,B, and C of its journey.
(b) A body of mass 20 kg is dropped from a height of 101 m . Find its K.E. and PE. after (i) 1st second (ii) 2nd second (iii) 3rd second.
