Science
Positive, negative and zero work
धनात्मक, ऋणात्मक और शून्य कार्य
In this Class 9 Science topic from “Work, Energy, and Simple Machines,” students learn how the direction of force and displacement determines the type of work done. They explore positive work, when force and displacement act in the same direction; negative work, when they act in opposite directions; and zero work, when there is no displacement or the force is perpendicular to motion. Everyday examples and the relation W = Fs cos θ help students connect these ideas with energy transfer and simple machines.
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Practice questions are not available for this topic yet. We plan to add questions with clear explanations soon. You can keep practising other topics in the meantime.
- Class / subject
- 9 · Science
- Chapter
- Work, Energy, and Simple Machines
- Topic
- Positive, negative and zero work
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