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To reduce the power requirement of elevator motors, elevators arecounterbalanced with weights connected to the elevator by a cablethat runs over a pulley at the top of the elevator shaft. Neglectany effects of friction in the pulley. Assume a 1000 kg elevator that carries a maximum load of 800 kgis counterbalanced with a mass of 1400 kg.
a) What is the power provided by the motor when the elevator ascends fully loaded at a speed of 2.6 m/s.b) How much power is provided by the motor when the elevator ascends at 2.6 m/s without a load?
A large, cylindrical roll of tissue paper of initial radius R lies on a long, horizontal surface with the outside end of the paper nailed to the surface. Determine the speed of the center of mass of the roll
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If you run the wire between the poles of a strong horseshoe magnet, subjecting 5.00 cm of it to a 1.95 T field (perpendicular to the wire), what force is exerted on this segment of wire
A string passes over a frictionless pulley and connects a 250 g block to 2.00 kg block. The inclines are frictionless. Assuming you release both masses from rest, how much time would it take the 250g to travel 2200cm next to the ramp.
In a historical movie, two knights on horseback start offvat rest 85m then start riding towards each other. How far from sir Georges starting point will the knights collide
Waves that are emitted in phase from two sources will undergo constructive interference when the paths from the sources differ by
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