In physics, work, energy, and power are closely related concepts that describe how forces cause motion and how energy is transferred. When you push or pull an object and it moves, you are doing work. The amount of work depends on how much force you apply and how far the object moves.
Energy is the capacity to do work. There are many forms of energy such as kinetic energy, which is energy of motion, and potential energy, which is stored energy due to position. For example, a moving car has kinetic energy, while a rock held above the ground has potential energy because of its height.
Power tells us how quickly work is done. It measures the rate at which energy is used or transferred. A powerful machine does the same amount of work in less time. For instance, two people can lift the same weight, but the one who does it faster produces more power.
Understanding work, energy, and power helps students see the connection between forces and motion. It also provides a bridge between mechanics and other branches of physics like electricity and thermodynamics.