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2. A guy is spinning initially at a constant rate with his arms at his sides. He then puts his arms straight out. His arms are 80 cm each and he has a wing span of 2.0 m. Each arm has a mass of about 10 kg (assume his arms are uniform cylinders.)
a) How much does his moment of inertia change when he sticks his arms out?
b) How much does his angular momentum change when he sticks his arms out?
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The concrete wall of a building is 0.10m thick. The temperature inside the building is 20.0 °C, while the temperature outside is 0°C. Heat is conducted through the wall.
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What is the coefficient of static between crate and incline
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High speed stroboscopic photographs show that the head of a 198 g golf club is traveling at 56.6 m/s just before it strikes a 45.0 g golf ball at rest on a tee. Find the speed of the golf ball just after impact
a block on a frictionless horizontal surface is attached to a spring (k=30 N/m). the mass is displaced to the right of equilibrium and released from rest. calculate amplitude of oscillations
A bucket of mass 1.50 is whirled in a vertical circle of radius 1.20. At the lowest point of its motion the tension in the rope supporting the bucket is 25.00 N. Find out the speed of the bucket. How fast must the bucket move at the top of the circle..
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