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Physics
If Ki and Kf are the initial and final values of kinetic energy of a body respectively, then the work done by the net force on the body is equal to
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Q. If $K_{i}$ and $K_{f}$ are the initial and final values of kinetic energy of a body respectively, then the work done by the net force on the body is equal to
Work, Energy and Power
A
$\frac{K_{f} K_{i}}{K_{f}-K_{i}}$
B
$K_{f}+K_{i}$
C
$\frac{K_{f}+K_{i}}{2}$
D
$K_{f}-K_{i}$
Solution:
According to work-energy theorem
$W=K_{f}-K_{i}$