In what circumstances is the work produced by a constant force regarded as negative?

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The displacement and the force are in opposite direction

The displacement and the force are in the same direction

The angle between the directions of force and displacement is 900

All of the above

answer is A.

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Detailed Solution

The work done by a constant force is negative, if the force and displacement are in opposite directions.
The force used to move or displace an object in the direction of the applied force is referred to as work. The preceding sentence can be stated mathematically as follows:

W = (F cos θ) d

= F . d

When the force and the displacement point are in the same direction, the work done is deemed positive. Therefore, the force acting on an item must be in the same direction as the object's displacement for work to be considered positive.

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