Question

What is the kinetic energy of a 2.4 kg brick travelling at a speed of 12 m/s in Joules?

Answer 1

We are asked to determine the kinetic energy of an object. To do that we will use the following formula:

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

Where "m" is the mass and "v" the speed of the object. Replacing the known values we get:

$k=\frac{1}{2}(2.4\operatorname{kg})(12\frac{m}{s})^2$

Solving the operations we get:

$k=172.8J$

Therefore, the kinetic energy is 172.8 Joules.