Work and Energy · Class 9 · CBSE Science
When is the work done by a force on an object said to be negative?
Practice question from Work and Energy (Class 9 · CBSE Science), with the correct answer and a step-by-step solution.
easy · MCQ · Q-2AF0AD
When is the work done by a force on an object said to be negative?
- A.The force and displacement are in the same direction.
- B.The force and displacement are in opposite directions.Correct answer
- C.The force is perpendicular to the displacement.
- D.The displacement of the object is zero.
Solution
Work done is given by . When the force and displacement are in opposite directions, the angle between them is , making , which results in negative work.
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