A 3.0kg circular hoop of radius 25cm is released from rest, from a platform 40m

Question

A 3.0kg circular hoop of radius 25cm is released from rest, from a platform 40m above the earth's surface.

Does the hoop's center of mass change throughout its journey? (Yes/No)   

Where is the hoop's center of gravity located?

a) In the center of the hoop (where there is no material).

b) Somewhere 5cm away from the center of the hoop.

c) Somewhere 15cm away from the center of the hoop.

d) Other.

Where is the hoop's center of mass located initially?

a) In the center of the hoop (where there is no material).

b) Somewhere 5cm away from the center of the hoop.

c) Somewhere 15cm away from the center of the hoop.

d) Other.

Explanation / Answer

Center of mass doesn't change throughout the journey

Center of gravity is located in the center of the hoop (where there is no material)

Center of mass is located in the center of the hoop (where there is no material)

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