Q. A ring solid sphere and a disc are rolling down from the top of the same height, then the sequence to reach on surface is
A) Ring, disc, sphere
B) Sphere, disc, ring
C) Disc, ring, sphere
D) Sphere, ring, disc
Explanation
(b) Time of descent $\propto \frac{K^{2}}{R^{2}}$
Order of value of $\frac{K^{2}}{R^{2}}$, sphere < Disc < Ring
(0.4) (0.5) (1.0)
It means sphere will reach the ground first and at last ring will reach the bottom
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.