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Q. A 78 particle is moving to the left at 11. How much work must be completed on the particle to cause it to move to right at 32?

Q. A rotating cylinder about 16- {rm km} long and 6.8 -km in diameter is designed to be used as a space colony. With what angular speed must it rotate so that the residents on it would experience the similar acceleration because of gravity as on Earth?

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