Forces (number 3 on wiki)

A force is a physical influence that is caused by the laws of physics. Here are for common forces; gravity, gravity is the gravitational pull of the Earth that pulls all things to the center, or close to as it, like the ground above the surface. The more weight that something the stronger the gravitational pull that the Earth has on the things. Air resistance,when a object goes through the air, it has friction with the air, and this forces the object to move slower if it is moving, as it makes going through harder. Mechanical force, is force made by a machine that makes work (force x distance). Drag, the force that is made when a object rips through the air, and air resistance slows a object going down and makes the process of going down look like the object slightly being dragged back up a little. Forces are measure in newtons. Force = mass x acceleration.