Question

A hollow sphere is rolling without slipping. Find ratio of rotational kinetic energy to total kinetic energy of sphere

(1) \(\frac{4}{7}\)  

(2) \(\frac{3}{7}\) 

(3) \(\frac{2}{7}\) 

(4) \(\frac{5}{7}\)

Answer 1

Correct Option is (3) \(\frac{2}{7}\) 

\(\frac{K_{rot}}{K_{total}} = \frac{2}{7}\)