Two uniform solid balls,one of radius R and mass M,the other of radius 2R and mass 8M,roll down a high incline.They start together from rest at the top of the incline.Which one will reach the bottom of the incline first?
A)The small sphere arrives first.
B)Both reach the bottom at the same time.
C)The large sphere arrives first.

Question

Quizplus · Accepted Answer

For rolling objects, the acceleration down an incline does not depend on the mass or the radius of the object but on the gravitational acceleration and the incline angle. Both spheres will have the same acceleration and thus reach the bottom at the same time.

Two Uniform Solid Balls,one of Radius R and Mass M,the