Going Against the Grain

Have you ever tried to slide a heavy object over a rough surface? If so, you probably found this feat difficult. This difficult arose due to the resistance between the two surfaces, called friction. Whenever two surfaces press together, rough catch on each other. The rougher the surfaces, the more friction. Friction causes the surface to resist being moved. Friction is a foce that opposes motion and slows movement. Energy will be lost to the frictional force and converted into unwanted heat and wear on the object being moved.There are four types of friction: static, sliding, fluid, and rolling. In this activity you will be observing two types of friction.

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Hannah Beardlsey Middle School
IL

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