A ball rolls without slipping. The radius of gyration of the ball about an axis passing through its centre of mass is . If radius of the ball be , then the fraction of total energy associated with its rotational energy will be 

a) 
b) 
c) 
d) 

A ball rolls without slipping. The radius of gyration of the ball about an axis passing through its centre of mass is . If radius of the ball be , then the fraction of total energy associated with its rotational energy will be 

a) 
b) 
c) 
d) 
