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Deduce the work-energy theorem for a con...

Deduce the work-energy theorem for a constant force.

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The difference of P.E. or K.E. required by a body at two different positions is equal to the amount of work done.
`int_(k_(i))^(k_(f))d(KE)=int_(x_(i))^(x_(f))Fdx=` work done
i.e. `W=K_(f)-K_(i)`.
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