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Work done by Diff type of forces

Question

In position A kinetic energy of a particle is 60 J and potential energy is -20 J. In position B, kinetic energy is 100 J and potential energy is 40 J. Then, in moving the particle from A to B

Moderate
Solution

Work done by conservative forces =UiUf=2040=60J

Work done by external forces=EfEi=14040=100J

Work done by all the forces=KfKi=10060=40J



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