Concept explainers
To Describe: The experiment to find which is hollow and solid.
Explanation of Solution
Given information:
Two Spheres look identical and have the same mass. However, one is hollow and the other is solid.
Formula used:
The torque is
Here,
Calculation:
Two spheres look identical. One is hollow and the other is solid. Spin each on the table. The sphere which spins at a lower rate will be the hollow sphere. This is because in a hollow sphere, the air inside tries to get away from the axis of rotation. Therefore, its moment of inertia
As the torque
In the case of a solid sphere, it will rotate more or less like a rigid body
Conclusion:
A solid sphere will rotate more or less like a rigid body.
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