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31 March, 23:50

If the child pulls with a force of 20 N for 12.0 m, and the handle of the wagon is inclined at an angle of 25 ∘ above the horizontal, how much work does the child do on the wagon?

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  1. 1 April, 00:07
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    Answer: 217.52 N

    Explanation: The applied force is 20 N, the distance covered is 12.0 m and the angle is 25° above the horizontal.

    Hence the formulae that defines work done is given by

    W = Force * distance

    But since the force has been inclined at an angle θ above the horizontal, the horizontal component of force is neccesary to produce the required motion to make the child do work on the wagon.

    Hence

    Work done = (horizontal component of force) * distance

    Work done = F cos θ * distance

    Work done = 20 cos 25 * 12 = 217.52 N
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