Conservative Forces
Easyphysics
Which of the following is NOT a conservative force?
Select the correct option:
Solution
Incorrect! Answer:
Friction force
- Conservative Force Characteristics: Work done is path-independent; closed loop work is zero; potential energy can be defined.
- Analysis:
- Gravity: Path independent, energy stored as GPE. (Conservative)
- Electrostatic: Path independent, energy stored as EPE. (Conservative)
- Spring: Dependent only on displacement from equilibrium. (Conservative)
- Friction: Always opposes motion; work depends on the total path length (e.g., circular path has non-zero frictional work). (Non-Conservative)
- Result: Friction force is not a conservative force.
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About This Question
- Subject
- physics
- Chapter
- work, energy and power
- Topic
- conservative forces
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Friction force
- Conservative Force Characteristics: Work done is path-independent; closed loop work is zero; potential energy can be defined.
- Analysis:
- Gravity: Path independent, energy stored as GPE. (Conservative)
- Electrostatic: Path independent, energy stored as EPE. (Conservative)
- Spring: Dependent only on displacement from equilibrium. (Conservative)
- Friction: Always opposes motion; work depends on the total path length (e.g., circular path has non-zero frictional work). (Non-Conservative)
- Result: Friction force is not a conservative force.
This easy difficulty physics question is from the chapter work, energy and power, covering the topic of conservative forces. It appeared in the 2025 exam.
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