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Question

George is pulling Cameron on a toboggan and is exerting a force of 40N acting at an angle of 60 to the ground. If Cameron is pulled by a distance of 100 m horizontally, then the work done by George is __ J

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Solution

See carefully. George is applying 40N at an angle of 60 to the horizontal direction. This horizontal direction is the same direction in which we are measuring our displacement. So the angle between force and displacement is 60

So work done=F.d=Fdcosθ=40×100×cos 60J=4000×(12)J=2000J


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