Question:
The false statement is
The false statement is
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Conservative forces have zero work over closed paths; friction is non-conservative.
Updated On: Apr 24, 2026
- Work energy theorem holds good in all inertial frames
- Work energy theorem is not independent of Newton's second law
- Work done is a scalar quantity
- Work done by the friction over a closed path is zero
- Work done by the friction on moving body is negative
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
Friction is a non-conservative force. Work done by non-conservative forces over a closed path is not zero.
Step 2: Detailed Explanation:
1. Work-energy theorem is valid in all inertial frames.
2. Work-energy theorem can be derived from Newton's second law.
3. Work is a scalar quantity.
4. Friction dissipates energy, so work done over a closed path is negative, not zero.
5. Friction opposes motion, so work done is negative.
Step 3: Final Answer:
The false statement is that work done by friction over a closed path is zero.
Friction is a non-conservative force. Work done by non-conservative forces over a closed path is not zero.
Step 2: Detailed Explanation:
1. Work-energy theorem is valid in all inertial frames.
2. Work-energy theorem can be derived from Newton's second law.
3. Work is a scalar quantity.
4. Friction dissipates energy, so work done over a closed path is negative, not zero.
5. Friction opposes motion, so work done is negative.
Step 3: Final Answer:
The false statement is that work done by friction over a closed path is zero.
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