Circular Motion Review

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1. Bob twirls a 0.615 kg mass at a constant speed in a 34.0 cm radius circle at a speed of 1.95 m/s. What is the centripetal acceleration? What force in what direction is he exerting at the top and the bottom

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2. Marlene twirls a 2.50 kg mass in a 62.0 cm radius vertical circle at a constant speed. At the bottom of the circle she needs to exert an upward force of 56.4 N of force. What is the centripetal acceleration? What force in what direction is exerted at the top?

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3. Red Elk twirls a 15.0 kg mass in a 1.50 m radius vertical circle. He is so clever that he can do this at a constant speed. At the top, he is pulling down on the mass with a force of 81.0 N. What is the centripetal acceleration of the mass? What is the force he must exert at the bottom?

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4. At what distance from the center of the Earth is the force of gravity 13.5 N on an 18.0 kg mass?

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5. What is the orbital velocity 2.00x106 m from the center of the moon? What is the period of your motion here?

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6. Question

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7. Question

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