Negative work means A) the kinetic energy of the object increases. B) the applied force is variable. C) the applied force is perpendicular to the displacement. D) the angle between the displacement vector and force vector is larger than 90^o. E) nothing; there is no such thing as negative work.

Question

Quizplus · Accepted Answer

Negative work occurs when the force applied is in the opposite direction of the displacement, i.e. the angle between the displacement vector and force vector is larger than 90 degrees. Option A is incorrect because negative work results in a decrease in the kinetic energy of the object. Option B is not necessarily true as the applied force can be constant or variable. Option C is incorrect because when the force is perpendicular to the displacement, no work is done. Option E is incorrect as negative work is a valid concept in physics.

Negative Work Means