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Unformatted text preview: alexander (jra2623) oldhomework 10 Turner (92510) 1 This printout should have 12 questions. Multiplechoice questions may continue on the next column or page find all choices before answering. 001 10.0 points The earth exerts a force of 1800 N on an or biting communications satellite that is 38 mi above the Earth. What is the magnitude of the force the satellite will exert on the earth? Correct answer: 1800 N. Explanation: According to Newtons Third Law of Mo tion, the satellite exerts the same magnitude force on the earth that the earth exerts on the satellite. The two force are equal and opposite in direction. 002 (part 1 of 2) 10.0 points A child holds a sled on a frictionless, snow covered hill, inclined at an angle of 33 . 8 6 N F 33 If the sled weighs 86 N, find the force ex erted on the rope by the child. Correct answer: 46 . 839 N. Explanation: Given : W = 86 N and = 33 . Consider the free body diagram for the block m g s i n N = m g c o s F W Basic Concepts: If we tilt our world, and consider the forces parallel to the hill, F net = summationdisplay F up summationdisplay F down = 0 then the forces perpendicular to the hill, F net = summationdisplay F out summationdisplay F in = 0 Solution: Consider the free body diagram for the sled: The weight of the sled has compo nents W sin acting down the hill and W cos acting straight into the hill....
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This note was uploaded on 10/20/2011 for the course PHY 302K taught by Professor Kaplunovsky during the Summer '08 term at University of Texas at Austin.
 Summer '08
 Kaplunovsky
 Force, Work

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