Question

What is the kinetic energy of a 3kg ball that is rolling 2m/s?

Answer 1

We can use the next formula

$K=\frac{1}{2}mv^2$

where K is the kinetic energy, m is the mass and v the velocity.

We have the next data

m=3kg

v=2m/s

We substitute

$K=\frac{1}{2}(3)(2)^2=6J$

ANSWER

The kinetic energy is 6J