Everything happens due to energy. Energy is the capacity to do work, and describes power, effort and force. Requirements (PDF) |
The force of gravitation is what we call gravity. Gravitational force exists between all objects, pulling them together. Requirements (PDF) |
We use machines every day to do work. A force is applied to a machine that is moved by an effort or load. Requirements (PDF) |
Motion is everywhere. Any time an object changes its position, motion occurs. Requirements (PDF) |