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प्रश्न
Which of the following statements is correct?
पर्याय
Work done by static friction is always zero.
Work done by kinetic friction is always negative.
Potential energy decreases when conservative force does Positive work.
Work-energy theorem is Valid only for newtonian frames.
MCQ
उत्तर
Potential energy decreases when conservative force does Positive work.
Explanation:
Work done by conservative force, Wc = -ΔU
If Wc is positive, then ΔU negative.
So, the potential energy decreases.
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Types of Forces
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