Forces are responsible for changing the motion of objects ... explain some of the most important interactions in nature. Energy, work and power Energy is a key principle in physics.

In contrast, kinetic energy is an object's energy due to its motion. Energy is essential to our lives, and understanding its nature and forms is crucial for creating sustainable and efficient systems ...

An apple of mass 100 g falls from a tree. It reaches a speed of 6 m/s before landing on Isaac's head. What is the gain of kinetic energy of the apple?