It state that work done by the net force acting on a body equal to the change produced in the kinetic energy of the body.
Work Energy Theorem For A Constant Force
When a force F acting on a body of mass m produces acceleration a in it. After covering distance s, let the velocity of the body changes from u to v.
Now, we use the equation of motion.
Work Energy Theorem For A Variable Force
Let a variable force F acts on a body of mass m and produces displacement ds in its own direction i.e θ = 0.
If the applied force increases the velocity from u to v, then the total work done on the body will be
This proves the work energy theorem for a variable force.
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NCERT Class 11 Physics Hand Written Notes Chapter-Wise
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