Potential danger presented by loose objects in a vehicle: Avoiding or reducing the effect of a collision.

The potential dangers of loose objects in vehicles are strongly associated with Newton's First Law of Motion, inertia. Inertia is when an object in motion tries to stay in motion, and an object at rest tries to remain at rest, unless the object is acted upon by an outside force. For example, say a car is traveling along a straight road. Loose objects in the auto are "acted upon" by the body, seats, or some …

…is a mass shift that closes an electrical contact, telling the sensors that a crash has just occurred. The air bag system ignites a solid propellant, which burns rapidly to create a large volume of nitrogen gas to inflate the bag. The bag then literally explodes from its storage site. A split second later, the gas quickly disappears through tiny holes in the bag, thus deflating the bag so the driver or passenger can move.