If a body of mass 3000g possesses 200J kinetic energy. At what speed the object must be moving?

Kinetic energy is the energy that a body possesses as a result of its motion.

$\mathrm{KE}=\frac{1}{2}{\mathrm{mv}}^2$

Where,  $\mathrm{m}=$ mass, and $\mathrm{v}=$ velocity

Given: Mass of the object$\left(\mathrm{m}\right)=3000\mathrm{g}=3\mathrm{Kg}$, and Kinetic energy $\text{(KE)=200J}$

The kinetic energy of the body is:

=$200=\frac{1}{2}\times 3\times {\mathrm{v}}^2$

The object must be moving at a speed of

${\mathrm{v}}^2=\frac{200\times 2}{3}=133.33$

$\mathrm{v}=11.54\mathrm{m}/\mathrm{s}$