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Newtons first law (INERTIA) Newtons first law states that "An object at rest will remain at rest, and a moving object will remain at a constant velocity unless a outside force is acted upon it." This can be related to skateboarding in many different ways the most obvious one being the "push" the method skaters use to gain velocity. Bearings are the most important tool used to keep the skateboard in a steady motion, The best bearings have the least friction, therefore the ideal bearing would be frictionless. Although there are not any frictionless bearings in the world there are ones that have allowed skating to be taken to new levels because they create very little friction allowing the skater to optimize and maintain the perfect speed. The type of ground also has a great effect on how long the board will stay in motion. If it is a rough surface the friction will be greater because the bumps and curves on the ground will act against the forward motion of the skateboarder. If it is a smooth surface a skateboarder will find it much easier to maintain a steady speed as well as his or her balance. A common practice in skateboarding is to use the force