Work done by retarding force is
Correct answer: B. Negative
- A. Positive
- B. Negative
- C. Zero
- D. None of these
Explanation
A retarding force opposes the motion of an object. Work done by a force is given by:W = F * d * cos θWhere:W = Work doneF = Forced = Displacementθ = Angle between force and displacementSince the retarding force acts opposite to the direction of motion, the angle between the force and displacement is 180 degrees. Therefore, cos 180° = -1. This makes the work done by a retarding force negative
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About Work and Energy
Work transfers energy when a force causes displacement, while kinetic energy, gravitational potential energy and power describe motion, position and the rate of energy transfer. The work-energy theorem links net work with change in kinetic energy, and efficiency accounts for energy losses rather than treating them as energy destruction.
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