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Q. A rotating cylinder about 18km in length and 6km in diameter is designed to be used as a space colony. With what angular speed must it rotate so that residents on it will experience the same acceleration because of gravity on Earth?

Q. A gorilla weighs 8x10^2N and swings from vine to vine. As the gorilla grads a new vine, both vines make an angle of 30degrees with the vertical. In such the condition of static equilibrium what is the net force on the vine?

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