going nowhere...

I thought this parked car was a good example of what we're learning right now. Gravity is pulling it down and normal force from the ground is pulling it up. Because of its weight (mass x gravity) and the equivalent normal force, the car is going nowhere vertically. There are also no forces pushing it in any other direction so because of this, its' net force is 0. This is the reason why it's still at rest. Newton's first law says that unless acted upon by a force, things that are at rest stay at rest and things that are in motion stay in motion. This car won't move/go anywhere until its net force changes from 0 to some other number. (Since I don't think anyone's going to try and push this car, starting the engine is probably the only way it's going to go anywhere!)