Newton's three laws and their relation to car safety?

Barton Sease: For cruise control:Friction in the drive train and air resistance act in opposition to the motion of the car, so they slow it down. If your car had a frictionless drive train and bearings, and it was in a vacuum traveling in a straight line at a constant velocity - it would just keep on moving at that constant velocity. But in real life friction and air resistance are acting in opposition to its motion - so these forces are unbalanced forces which act to slow your car down. So, in order to keep your car moving at a constant velocity, the engine must be used to "counteract" these unbalanced forces.So your cruise control opens the throttle, to counteract the forces of friction in the drive train and air resistance (and gravity, if you're traveling up an incline)....Show more

Particia Thorton: Newton's three laws1. An object at rest will remain at rest unless acted on by an unbalanced force. An object in motion continues in motion with the same speed a! nd in the same direction unless acted upon by an unbalanced force.2. Acceleration is produced when a force acts on a mass. The greater the mass (of the object being accelerated) the greater the amount of force needed (to accelerate the object).3. For every action there is an equal and opposite re-action....Show more