State work energy theorem prove it for variable force
Asked by admin @ in Physics viewed by 417 People
State and prove work -energy theorem for a variable force ?
Answered by admin @
Work energy theorem -
it states that the work done by the net force acting on a body is equal to the changed produced in kinetic energy of the body.
Proof-
we use equation of motion
v square - u square =2as
multiplying both sides by m/2
we get
mv square /2 + mu square/2 = mas
by Newton second law
F=ma
now
mv square /2 -mu square/2 = Fs =W
then it can be written as
Kf - Ki = W
this is the proof of work energy theorem.......
I HOPE THIS WILL HELP YOU.
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