You can see this law in action all the time. For example, it is this law of motion that governs a car as you come to a stop sign. You know that the car will remain in motion unless you apply the brakes. When you do press the brakes, you see another example -- anything that is in your car that is not held down will slide forward. This is because it wants to remain in motion since there is nothing stopping it from continuing in the direction it was going.