Physics of the Ollie Skateboard Move :: physics skateboarding trick tricks

Missing figuresBrief History of Skateboarding.In the beginning, skate consisted of a 2x4 and some old roller-skate wheels. Around the 1950s with the boom in the surfing popularity, skate became more popular. During this time it was k nown as sidewalk surfing. In the 1960s is when skateboarding really took off. This is when the first skateboards were produced and sold. During this time period skateboarding consisted of cruising around the streets on your board. In 1978 a 15 year old boy by the name of Alan Ollie Gelfand invented a trick he called the no-hands air. His friends named after him the ollie. This was a kurrat based trick. In the coming years a rider by the name of Rodney Mullen took the trick and use it to flatland skateboarding. After this point skateboarding began to grow in to the sport it is today. Virtually every trick in the current day skateboarding involves the ollie. When a skateboarder rolls land the street they have ram downs acting in the X and Y direction. The forces that I will focus on atomic number 18 only in the Y direction. As a skater rides down feather the street there are three forces acting on the skateboard. The passing arrows in the image indicate the force of sobriety on the gage of the skater(Mg). The black arrow represents the force of gravity on the skateboard(mg). The blue arrows are the FN or natural force of the ground pushing up on the wheels of the board. These forces have a net force of zero.Sum of forces in Y Mg + mg - FN = 0As the skater prepares to ollie they lower the center of gravity by bending at the knees and waist. Next the skater will begin to flip ones lid in the positive Y direction by pressing down on the tail of the board. The red arrows now have an uneven dissemination to the tail of the board cause lift on the nose. All of the FN is now pushing up on the rear wheels.At this point the skater is has applied a large downward force on the tail causing the boar d to pop or bounce off of the ground. The downward force applied is greater than the force of gravity allowing the board to begin going away the ground.