Question

A sphere and a disc of same mass and same radius, start rolling on a smooth inclined plane upto the same distance. The ratio of times taken by them will be:

(a) 15 : 14

(b) 15¹ : 14²

(c) \(\sqrt{14}:\sqrt{15}\)

(d) 14 : 15

Answer 1

Correct option is : (c) \(\sqrt{14}:\sqrt{15}\)

Time taken by a rolling body on an inclined plane

Thus option (c) is correct.