Physics for IGCSE & O level - Forces And Motion (Section 5 - No. 27)
If you double the speed of an object, what happens to its kinetic energy?
It doubles.
It triples.
It quadruples.
It halves.
Εξήγηση
Kinetic energy is proportional to the square of the velocity. Therefore, doubling the velocity quadruples the kinetic energy.