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27 Oct 2018
3) (10 pts] A physics professor, working on his summer research, is struggling to put a massive telescope structure in place while it is suspended from a crane (see diagram). The mass of the structure is 1000 kg, and the correct position for it is at a 15 degree angle from directly below the crane. The crane cannot be moved. a. Draw the free-body diagram on the structure, labeling all forces. b. What horizontal force does the professor need to apply to keep the structure directly over the mounting point? c. Given a coefficient of static friction between the professor's shoes and the ground of us = 1.0, can the 90 kg professor do this? If not, how many 90-kg professors would it take (assume you can't have fractional professors, so answer with an integer)? crane professor structure mounting point
3) (10 pts] A physics professor, working on his summer research, is struggling to put a massive telescope structure in place while it is suspended from a crane (see diagram). The mass of the structure is 1000 kg, and the correct position for it is at a 15 degree angle from directly below the crane. The crane cannot be moved. a. Draw the free-body diagram on the structure, labeling all forces. b. What horizontal force does the professor need to apply to keep the structure directly over the mounting point? c. Given a coefficient of static friction between the professor's shoes and the ground of us = 1.0, can the 90 kg professor do this? If not, how many 90-kg professors would it take (assume you can't have fractional professors, so answer with an integer)? crane professor structure mounting point
Keith LeannonLv2
28 Oct 2018
