problem07_28

University Physics with Modern Physics with Mastering Physics (11th Edition)

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7.28: a) From (0, 0) to (0, L ), 0 = x and so , 0 = F , and the work is zero. From (0, L ) to ( L , L ), F and l d are perpendicular, so . 0 = l F d and the net work along this path is zero. b) From (0, 0) to ( L , 0), . 0 = l F d From ( L , 0) to ( L , L ), the work is that found in the example, , CL W 2 2 = so the total work along the path is
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Unformatted text preview: . 2 CL c) Along the diagonal path, y, x = and so ; dy Cy d = l F integrating from 0 to L gives . 2 2 CL (It is not a coincidence that this is the average to the answers to parts (a) and (b).) d) The work depends on path, and the field is not conservative....
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