When a body moves against the force of friction on a horizontal plane, the work done by the body is?
Answer: Negative
Explanation
When a body moves against the force of friction on a horizontal plane, the work done by the body is negative.
This is because work is defined as the dot product of force and displacement,
And when moving against friction, the force of friction acts in the opposite direction to the displacement of the body,
Resulting in an angle of 180 degrees between them.
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