Question

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state and prove work energy theorem​

Answer 1

Answer:

W= ΔKE =1/2m$vf^{2}$-1/2m$vi^{2}$

Explanation:

let us consider the case F is  resultent force, a is accerlertion,m is mass

F = ma, d is displacement.

$vf^{2}$=$vi^{2}$+2ad(from eq of straight line)

d= $vf^{2}$-$vi^{2}$/2a

w=Fd = ma( $vf^{2}$-$vi^{2}$/2a)=1/2m$vf^{2}$-1/2m$vi^{2}$