In order to make our games more realistic and therefore simulate real life, we make use of physics. However, to make use of it within our games, we first need to understand the basics of physics.
Just as a game needs rules in order to function, so too does the world around us. The natural world is governed by rules. The science that explains how the world is governed by these rules using measurable data is known as natural science. Physics is a branch of natural science that explains matter and the motion of matter through time and space.