Q. Two solid discs of radii $r$ and $2r$ roll from the top of an inclined plane without slipping. Then
A) The bigger disc will reach the horizontal level first
B) The smaller disc will reach the horizontal level first
C) The time difference of reaching of the discs at the horizontal level will depend on the inclination of the plane
D) Both the discs will reach at the same time
Explanation
The correct answer is Option D: Both the discs will reach at the same time.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.