A baseball bat can be rotated around many different axes of rotation. Three such possibilities are shown in (Figure 1)

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A baseball bat can be rotated around many different axes of rotation. Three such possibilities are shown in (Figure 1)

Figure 1:

Part A: A baseball bat can be rotated around many different axes of rotation. Three such possibilities are shown in (Figure 1) . Rank the baseball bat's moment of inertia about each of these three axes of rotation.

Rank the moment of inertia from largest to smallest and overlap axes labels if the same.

Part B: Given the same baseball bat and possible axes of rotation shown in (Figure 1) , for which axis of rotation would it be the easiest to rotate the bat from rest?

A

B

C

Part C: A girl spins around in a circle trying to make herself dizzy. Without changing her position, she starts spinning twice as fast. By how much did her rotational kinetic energy change?

It did not change

It doubled

It quadrupled

It halved

Part D: A solid sphere and a hollow sphere (spherical shell) of the same mass and same radius rotate with the same amount of kinetic energy. Which one is rotating faster?

Neither; they must be rotating at the same speed

The solid sphere

The hollow sphere

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A baseball bat can be rotated around many different axes of rotation. Three such possibilities are shown in (Figure 1)

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