AP Physics 1· difficulty 4/5
A solid sphere () and a hoop () are released from rest at the same height on an incline and roll without slipping. Which reaches the bottom first?
They tie because mass cancels
Sphere; its acceleration is vs hoop
Hoop; lower moment of inertia
Sphere only if it is heavier
Explanation
Acceleration on incline is . Sphere: ; hoop: . Sphere wins.
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