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1. A 250 g microphone is being swung in an exact circle of radius 1.0 meters at a speed of 5.0 meters per second that

1. A 250 g microphone is being swung in an exact circle of radius 1.0 meters at a speed of 5.0 meters per second that is exactly constant. What is the work done on the planet as it moves 6.3 meters?
2. Your room-mate pushes a couch in a straight line from position 20.00 m k to the position 4.00 m i + 20.00 m k with a force of 250 N . What is the work that your room-mate does on the couch?
3. A 10.0 kg rocket falls from a height of 1.60 km to a height of 0.10 km What is the work that gravity does on the rocket?

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