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Your heart beats ~100,000 times a day — roughly 3 billion beats in a lifetime.
Did you know?
Your heart beats ~100,000 times a day — roughly 3 billion beats in a lifetime.
Three objects, A: (a solid sphere), B: (a thin circular disk) and C: (a circular ring), each have the same mass and radius They all spin with the same angular speed about their own symmetry axes. The amounts of work (W) required to bring them to rest, would satisfy the relation
To solve this problem, we need to calculate the work done to bring each object to rest.The work done is equal to the change in kinetic energy, which is given by:where is the moment of inertia and is the angular speed.Let's calculate the moment of inertia for each object:• For a solid sphere (A):• For a thin circular disk (B):• For a circular ring (C):Now, calculate the work done to bring each object to rest:• Work done for the solid sphere (A):• Work done for the thin circular disk (B):• Work done for the circular ring (C):Now, compare the work done for each object:Therefore, the correct relation is:Option 3: This corresponds to Option 3.
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