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A sledge loaded with bricks has a total mass of 18.1 kg and is pulled at constant speed by a rope inclined at 20.8° above the horizontal. The sledge moves a distance of 19.8 m on a horizontal surface. The coefficient of kinetic friction between the sledge and surface is 0.500.
(a) What is the tension in the rope?
N
(b) How much work is done by the rope on the sledge?
kJ
(c) What is the mechanical energy lost due to friction?
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A ski lift carries 900 skiers per hour up a slope with a constant incline of 15 degrees and a vertical drop, How much power is required to run the lift
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Two small non conducting spheres have a total charge of 85.2. When placed 1.09 apart, the force each exerts on the other is 10.4 and is repulsive. What is the charge on each.
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