Question

Which of the following is not correct? Select one: a. Work occurs when a force is...

Which of the following is not correct?

Select one:

a. Work occurs when a force is applied to an object through so that the object is moved some distance.

b. If a force is applied to an object but there is no displacement, then no work is done.

c. The work done by gravity is always negative.

d. The work done by a constant force is the product of the magnitudes of the parallel component of the force and the displacement.

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Answer #1

c. The work done by gravity is always negative.

Work done by gravity could be positive or negative depending on the direction of displacement since gravity always acts downward.

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