Inertia

In this video, it shows an example of how inertia works in a car. Knowing Newton's 1st law, an object in motion/rest stays in motion/rest unless acted on by an outside force. In this example we see the car and you are in motion, and once the driver presses on the breaks you continue to want to go forward because you were already in motion. Inertia is the property of matter by which it retains its state of rest or its velocity along a straight line so long as it is not acted upon by and external force (dictionary.com).