Starting from rest at the same time,a coin and a ring roll down an incline without slipping.Which reaches the bottom first?
A)The ring reaches the bottom first.
B)The coin reaches the bottom first.
C)They arrive at the bottom simultaneously.
D)The winner depends on the relative masses of the two.
E)The winner depends on the relative diameters of the two.

Question

Quizplus · Accepted Answer

The coin reaches the bottom first because it has a higher moment of inertia relative to its mass than the ring, allowing it to accelerate down the incline faster due to less energy being stored in rotational motion.

Starting from Rest at the Same Time,a Coin and a Ring