Suppose you are standing on the edge of a spinning carousel and step off at righ

Question

Suppose you are standing on the edge of a spinning carousel and step off at right angles to the edge (radially outward). Now consider it the other way. You are standing on the ground next to a spinning carousel and you step onto the platform at right angles to the edge (radially inward).

a) There is no change in rotational speed of the carousel in either situation.
b) There is a change in rotational speed in the first situation but not the second.
c) There is a change in rotational speed in the second situation but not the first.
d) There is a change in rotational speed in both instances.

Explanation / Answer

Since you have mass and you are removing mass in the first instance and adding mass in the second the rotational speed should speed up in the first situation and slow down in the second therefore the answer is (d).

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