Question

Can the kinetic energy of a body be negative?

Answer 1

1. "No" kinetic energy of a body can not be negative.
2. We know that,

$KineticEnergyK.E.=\frac{1}{2}\left[mass\times {\left(velocity\right)}^2\right]$

3. The kinetic energy can not be negative because the mass can not be negative and the square of the velocity gives a non-negative number.