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3 cards from this section. Quick, good the night before a test.
What is friction?
Think about what happens when you slide something on a table.
What type of friction occurs when an object is at rest?
Consider what happens before you start moving a heavy box.
What type of friction acts on a stationary object?
Think about what happens before something starts to move.
True or False: Rolling friction is generally greater than sliding friction.
Think about how easy it is to roll versus slide an object.
A train moves forward with a static friction force of 100 N and sliding friction takes over as it speeds up to 80 N. Calculate how friction changed as it transitioned.
Think about the transition from still to movement.
Design an experiment to demonstrate the effect of lubricants on friction, including variables and expected outcomes.
Consider different types of lubricants and surfaces.
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