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Hold your open hand at shoulder-height, and have your associate carefully place a Bowling ball in your hand. Now allow the hand and bowling ball to descend slowly to the floor. Your hand has done 'negative work', equal to the (weight of the ball) times (distance it descended).

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Q: What is negative work done?

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When work is done in negative it can effect how well the work is performed and the outcome of the work.

Yes. If force is negative, then work will be negative.

If work is done on the system then it has a negative sign. If work is done by the system then it has a positive sign.

Yes - work can be done BY a system or ON a system. Depending on whether the work is going into the system or out of it the sign on the work can be negative or positive.

There are different conventions as to what work is negative and what work is positive. The convention used by engineers and physicists is that work done BY the system on its surroundings is positive while work done ON the system by its surroundings is negative. Chemists reverse these conventions.

the formula F.S cos angle is used (the dot product) so if angle is 0,cos angle=1 hence work done is positive and maximum if angle is 90 so cos 90 is 0 hence work done is minimum if work done is negative the angle is 180 The work done by friction is always negative (opposite the force) Since work is force x displacement, a negative value for work could mean that the displacent was negative

Negative work increases potential energy.

Negative

Positive.

Negative work

Work done by the system is considered as PositiveWork done on the system is considered as Negative

negative

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