An elevator has a fully loaded mass of 1200 kg. It moves upward at a constant speed of 2.5 m s−1. If a constant frictional drag of 3000 N opposes its motion, determine the minimum power the motor must deliver. (Assume g = 10 m s−2)
Since speed is constant, the upward driving force must balance all downward forces (gravity + friction). Total Force
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HardA particle of mass m is driven by a machine that delivers a constant power k watt. If the particle s
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