NCERT · Class 9 · Science · Work and EnergyWhen is work said to be done in physics?
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Total Attempts: 1
Accuracy Rate: 100%
Step-by-Step Solution
Work is done only when a force acts on an object and the object is displaced in the direction of the force. Mathematically, $W = F \times s$. If displacement is zero, work done is zero.
Detailed Options Breakdown
Option : When force acts on an object
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Work and Energy.
Option 1: When a force causes displacement of an object (Correct Answer)
Correct choice. Refer to the step-by-step verified solution guidelines above for details.
Option 2: When an object is at rest under force
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Work and Energy.
Option 3: When energy is stored in the object
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Work and Energy.
💡 Study Guide: This question tests core syllabus concepts from Work and Energy. For formulas, key summaries, and mock exam reference guides, read the full Work and Energy Revision Notes.