Physics

Kinetic energy measures the energy an object has because it's moving—it depends on both how heavy something is and how fast it's going. The key is to use the formula $KE = \frac{1}{2}mv^2$ and pay careful attention to units: calculate in joules first, then convert to kilojoules by dividing by 1000.

Kinetic energy measures the energy an object has because it's moving—it depends on both how heavy something is and how fast it's going. The key is to use the formula $KE = \frac{1}{2}mv^2$ and pay careful attention to units: calculate in joules first, then convert to kilojoules by dividing by 1000.