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Unformatted text preview: Physics 211 Test #3 fall 2007 Name:_________________________ 1. (a) A force k N j N i N F ) 4 ( ) . 3 ( ) . 2 (-- = acts on an object that moves in a straight line through a displacement k m j m i m d ) . 2 ( ) . 5 ( ) . 3 (- + = . What work does the force do on the object during this displacement? (b) A boy pulls a wagon along a horizontal path. The force with which he pulls has a magnitude of 24 N and it is directed at an angle of 25 o above the horizontal. How much work does the pulling force do as the wagon moves through a distance of 25 meters? (c) A sky diver with her parachute fully deployed is falling vertically at a steady speed. The diver-parachute system has a total mass of 75 kilograms What work is done by the drag force on the diver-parachute system during a descent of 1500 meters?...
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