Question

When the speed of a body is doubled, its kinetic energy becomes

• A. Double
• B. Half
• C. Quadruple
• D. One-fourth

Answer 1

The correct option is C Quadruple

The kinetic energy of a body is given by:

$KE=\frac{1}{2}m{v}^2$

Hence, Kinetic energy depends on the velocity as:

$KE\propto v^2$

So, if we double the velocity, then $KE$ becomes four times.

Hence, option C is correct.