PHY 131 Chapter Notes - Chapter 7: Cartesian Coordinate System, Junkers J 1
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PHY 131 Full Course Notes
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Chapter 7. 1: work done by a constant force. The work done on an object by a constant force (constant in both direction and magnitude) is defines to be the product of the magnitude of the displacement times the component of the force parallel to the displacement. Also: =cos(cid:1856) where cos is the component of the vector f that is || to the displacement. We will discuss the second type which we call scalar product/dot product: If we have two vectors (cid:1827) and (cid:1827)(cid:1828) then their scalar product is defined to be: (cid:1827) (cid:1828) =(cid:1827) (cid:1828) (cid:1855)(cid:1867) Where a and b are the magnitudes of the vectors and theta is the angle (/,180 degrees) between them when their tails touch. The work done by a variable force in moving an object between two points is equal to the area under the (cos) versus (l) curve between those two points. (cid:3029)
