Also refer to physics, motion, inertia, momentum, friction, velocity, acceleration, gravity, Newton, education, WBT, School for Champions, Kurtus Technologies, Milwaukee, Wisconsin. In the explanation of Linear Motion , you saw how objects move. This lesson will explain how forces cause things to move. In general, most things are standing still. But as you look around, you may see things that were still suddenly start to move for one reason or another.
Some men push a stalled car down the street.
You blow up balloon, and it flies away as the air rushes out. You hold a stick under water, and after you let it go, it shoots up to the surface. There is a common factor in the motion of the above examples. In every case, a force was acting on the object. The forces in the examples are respectively gravity, pushing, air pressure, and buoyancy.