Mechanical Engineering Exam > Mechanical Engineering Questions > Work done by conservative force is equal toa)...
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Work done by conservative force is equal to
- a)Decrease in potential energy
- b)Increase in kinetic energy
- c)Increase in potential energy
- d)Decrease in kinetic energy
Correct answer is option 'A'. Can you explain this answer?
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Work done by conservative force is equal toa)Decrease in potential ene...
Non-conservative forces:
- A non-conservative force is one for which work depends on the path taken.
- Friction is an example of a non-conservative force that changes mechanical energy into thermal energy.
- Work Wnc done by a non-conservative force changes the mechanical energy of a system.
- In equation form, Wnc = ΔKE + ΔPE or, equivalently, KEi + PEi = Wnc + KEf + PEf.
Conservative forces:
- A conservative force is one, for which work done by or against it depends only on the starting and ending points of a motion and not on the path taken.
- Example potential energy, gravitational force etc.
- Work done by conservative force is equal to decrease in potential energy.
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Work done by conservative force is equal toa)Decrease in potential energyb)Increase in kinetic energyc)Increase in potential energyd)Decrease in kinetic energyCorrect answer is option 'A'. Can you explain this answer?
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