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Q1. A 2.90-m-long, 300 kg steel beam extends horizontally from the point where it has been bolted to the framework of a new building under construction. A 65.0 kg construction worker stands at the far end of the beam. What is the magnitude of torque about the point where the beam is bolted into place?
Q2. A heavy piece of hanging sculpture is suspended by a 146.0 cm long, 8.03 gm wire. When the wind blows hard, wire hums at its fundamental frequency of 113.0 Hz. What is the mass of the sculpture (in kg) assume that the local acceleration due to gravity is 9.80 m/s2?
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If a metal wire carries a current of 23.0 mA, how long does it take for 12.0×1020 electrons to pass a given cross-sectional area anywhere along the wire? The magnitude of the charge on an electron is 1.6 × 10-19 C.
A bullet of mass 0.0022 kg initially moving at 496 m/s embeds itself in a large fixed piece of wood and travels 0.64 m before coming to rest. Imagine that an acceleration of the bullet is constant.
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