Q. A body is rolling down an inclined plane. Its translational and rotational kinetic energies are equal. The body is a
A) Solid sphere
B) Hollow sphere
C) Solid cylinder
D) Hollow cylinder
Explanation
(d) $K_{T} = K_{R} \Rightarrow \frac{1}{2}mv^{2} = \frac{1}{2}mv^{2}\left( \frac{K^{2}}{R^{2}} \right) \Rightarrow \frac{K^{2}}{R^{2}} = 1$
This value of $K^{2}/R^{2}$ match with hollow cylinder
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.