2012_1061_Lecture_Ch_078

Does the earth work on the moon the answer is no

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Unformatted text preview: me work if he lifts the backpack a height h. Does the Earth work on the Moon?  The answer is No! Because the direction of the force of gravity is perpendicular to the displacement at any instant Work done by a Varying Force  The work done by a variable force in moving an object between two points is equal to the area under the ( ) versus ( ) curve between those two points. Work Done by a Spring Force  To hold a spring either compressed or stretched an amount from its relaxed length requires a force that is directly proportional to  The spring exert a force in the opposite direction k is the spring constant describing its stiffness Important e...
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