I want to prove that F* v=1/2* F*v
A moving on a horizontal surface with height =0 and u=0
therefore P.E is 0 ..
Let the velocity be v and force be f and displacement be s and time taken =t
as we know that K.E =f*s when P.E is zero
f*s =1/2 m v^2
Power = work done /time
(f*s)/t=(1/2 m v^2)/t
f*s/t=(1/2 m v * v) /t
as s/t =v and v/t(when u is 0) =a
f* v = 1/2 m * a * v
m * a = f
f * v =1/2 f * v
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