MP Board · Class 9 · Science · Work and EnergyWhen is the work done by a force zero?
Step-by-Step Solution
Work done is zero if either the force is zero, the displacement is zero, or the force and displacement are mutually perpendicular ($90^\circ$ angle).
Detailed Options Breakdown
Option : When force and displacement are in the same direction
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Work and Energy.
Option 1: When force and displacement are perpendicular to each other (Correct Answer)
Correct choice. Refer to the step-by-step verified solution guidelines above for details.
Option 2: When displacement is maximum
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Work and Energy.
Option 3: When force is maximum
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.