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2 cards from this section. Quick, good the night before a test.
What force opposes the motion between surfaces?
Think about the force that stops a moving object.
What happens when a pencil cell rolls on a rough surface compared to a smooth surface?
Consider which surface would provide more resistance.
What is friction?
Think about what happens when you try to slide something across a table.
True or False: Friction can exist between two smooth surfaces.
Consider the surfaces closely; are they ever absolutely smooth?
If you double the weight of an object sliding on a surface while keeping a constant surface roughness, how does this affect the friction force? Provide calculations.
Remember the relationship between weight and normal force.
Design a model to compare rolling friction and sliding friction using common classroom objects. Explain your findings.
Reflect on the differences in surface contact.
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