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5. A hollow sphere, a solid cylinder, and a hollow cylinder are all released from rest...

5. A hollow sphere, a solid cylinder, and a hollow cylinder are all released from rest at the top of a ramp. Which object reaches the bottom of the ramp first? (a) The hollow sphere (b) The solid cylinder (c) The hollow cylinder (d) They all reach the bottom of the ramp at the same time

6. What is the formula for the moment of inertia of a hollow cylinder rotating about an axis at its edge? (a) I = 1 2 MR2 (b) I = MR2 (c) I = 3 2 MR2 (d) I = 2MR2

is this correct

5b

6b

is that correct

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