what is the conclusion of friction
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In this lab, my partners and I tried to find out what the relationship between the normal force and frictional force of a brick is. We found out that whenever the normal force of the brick, or with any object increases, the frictional force also increases.
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We measured the friction coefficient of a rigid body sliding on a powder layer. As a result, we found that friction coefficient became small at a speed higher than a critical value. ... The obtained friction coefficient was smaller than the normal friction coefficient between rigid bodies.
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