Machines Problem Solving Exercise

# Machines Problem Solving Exercise - A crate of bananas...

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1. A crate of bananas weighing 3000. N is shipped from South America to New York, where it is unloaded by a dock worker who lifts the crate by pulling with a force of 200. N on the rope of a pulley system. What is the actual mechanical advantage of the pulley system? 2. Two clowns, of mass 50.0 kg and 70.0 kg respectively, are in a circus act performing a stunt with a trampoline and a seesaw. The smaller clown stands on the lower end of the seesaw while the larger clown jumps from the trampoline onto the raised side of the seesaw, propelling his friend into the air. a) what is the ideal mechanical advantage of the seesaw? b) If the larger clown exerts a force of 850. N on the seesaw as he jumps, how much force is exerted on the smaller clown? 3. A jackscrew with a handle 30.0 cm long is used to lift a car sitting on the jack. The car rises 2.0 cm for every full turn of the handle. What is the ideal mechanical advantage of the jack? 4.

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## This note was uploaded on 11/18/2010 for the course CPHY 101 taught by Professor Jay during the Fall '10 term at University of Massachusetts Boston.

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Machines Problem Solving Exercise - A crate of bananas...

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