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The helicopter in the drawing is moving horizontally to the right at a constant velocity. The weight of the helicopter is W = 56800 N. The lift force generated by the rotating blade makes an angle of 21.0° with respect to the vertical.
(a) What is the magnitude of the lift force?
(b) Determine the magnitude of the air resistance that opposes the motion.
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a 45.7 kg girl is standing on a plank that has a mass of 152 kg. the plank originally at rest is free to slide on a
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In a mass spectrometer, a singly charged ion having a particular velocity is selected by using a magnetic field of 0.1 T perpendicular to an electric field of 8.00 102 V/m. What is the mass of the ion
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