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A model airplane of mass 0.790 kg is flying at constant speed in a horizontal circle at one end of a 26.0 m cord and at a height of 11.0 m. The other end of the cord is tethered to the ground. The airplane circles 5.60 times per minute and has its wings horizontal so that the air is pushing vertically upward.
(a) What is the acceleration of the plane?
(b) What is the tension in the cord?
(c) What is the total upward force (lift) on the plane's wings?
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what is the ratio of the amplitude of the damped oscillations. You shoot a 58-g pebble straight up with a catapult whose spring constant is 310 N/m. The catapult is initially stretched by 0.20 m. How high above the starting point does the pebble f..
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