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a particle in a certain conservative force field has a potential energy given by U=20xy/z the force exerted on it is |
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Answer» a particle in a certain CONSERVATIVE FORCE field has a potential energy given by U=20XY/z the force exerted on it is... solution : concept : rate of change of potential energy of an OBJECT with respect to its position gives force APPLIED on that object. i.e., F = dU/dr here it is given that, U = 20xy/z from partial derivatives , F = dU/dx i + dU/dy j + dU/dz k dU/dx = (20y/z) dx/dx = (20y/z) dU/dy = (20x/z) dy/dy = (20x/z) dU/dz = (20xy) d(1/z)/dz = -(20xy/z²) hence, F = (20y/z) i + (20x/z) j - (20xy/z²) k |
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