A uniform sphere of mass 500 g rolls without slipping on a plane horizontal surface with its centre moving at a speed of 5.00 cm/*. Its kinetic energy is :
(1) 8.75 × 10–4 J
(2) 8.75 × 10–3 J
(3) 6.25 x 10-4 J
(4) 1.13 x 10-3 J
Answer is (1) 8.75 x 10-4 J
m = 0.5 kg, v = 5 cm/*
= 8.75 × 10–4 J
