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2/13/2013 Period 2

Sydney Schoeller

on 13 February 2013

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Transcript of Friction

Without it, we definitely
would not be the way we are today. Static Friction Sliding Friction Rolling Friction Fluid Friction Friction What is it? Friction is a force that any two surfaces of objects exert on each other when they rub together Without friction, we wouldn't be able to stop, or go unless another object hit us. Friction can be frustrating at times Sometimes, there is too much friction ... and other times, not enough There are four different types of friction that can cause objects to act in very different ways Static friction is the type of friction that effects objects that aren't moving. For example, if you wanted to move a chair, you would have to first overcome the amount of static friction holding the chair in place. Sliding friction is the force that acts between two objects when they slide across each other. This type of friction is the reason why you slip when you walk on ice. The bottom of your shoe slides across the slippery surface of the ice. Sliding friction is the force that allows you to slide a paper across the table, or push a chair under a desk. Rolling friction is the force that occurs when an object, such as a wheel of a car, rolls across a surface When a bicyclist pushes against the pedals, the wheels start to move, or roll on the ground. This is because of rolling friction. The amount of force needed to overcome rolling friction is less than sliding friction. This is because the surface area that is rubbing against the other object is much less. Fluid friction is the friction that happens when a solid object moves through a fluid When a plane flies through the air, it experiences fluid friction. That is because the plane is going through the air which is a fluid. If you put oil in between the parts of a machine, they move faster because they experience fluid friction instead of sliding friction. Fluid friction requires a much lesser force than sliding friction. By Sydney Schoeller
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