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Work done by a Constant Force

Let a constant force 39261.png be applied on the body such that it makes an angle θ with the horizontal and body is displaced through a distance 40794.png (Fig. 1).
Fig. 1
or 39248.png = Fs cos θ
Thus, work done by a force is equal to the scalar or dot product of the force and displacement of the body.
If a number of forces 39242.png are acting on a body and shift from position vector 39236.png to position vector 39230.png, then

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