Question

For a hollow cylinder and a solid cylinder rolling without slipping on an inclined plane, then which of these reaches earlier

• A. solid cylinder
• B. hollow cylinder
• C. both simultaneously
• D. can't say anything

Answer 1

Answer: (A)

solid cylinder

Answer 2

Solid sphere reaches the bottom first because for solid cylinder$\frac{K^2}{R^2}=\frac{1}{2},$
and for hollow cylinder$\frac{K^2}{R^2}=1$.
Acceleration down the inclined plane $∝ \frac{1}{K^2/R^2}$.
Solid cylinder has greater acceleration, so it reaches the bottom first.