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If the velocity of a body is doubled its kinetic energy:a. gets doubled b. becomes half c. does not change d. becomes 4 times
Because kinetic energy $K=\frac{1}{2}mv^2$, while $m\rightarrow$mass, $v\rightarrow$velocity.
If the velocity is doubled, the velocity becomes $2v$, therefore, kinetic energy $K'=\frac{1}{2}m(2v)^2=4\times\frac{1}{2}mv^2=4K$.
Therefore, the kinetic energy becomes 4 times.
So, option d is correct.
Updated on: 10-Oct-2022
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