State whether the work done by an applied force on a body moving on through a horizontal plane with uniform velocity is positive or negative.

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Solution

Work done by an applied force:
When a body moves in a horizontal plane, a uniform velocity should be maintained also a uniform force must be applied.
The applied force acts along the direction of motion of the body, so the work done will be positive.
Thus, the work done by an applied force on a body moving on through a horizontal plane with uniform velocity is positive.

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