9.7 - Keywords
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Practice Questions
Test your understanding with targeted questions
What is friction?
💡 Hint: Think about what happens when you slide something on a table.
What type of friction occurs when an object is at rest?
💡 Hint: Consider what happens before you start moving a heavy box.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What type of friction acts on a stationary object?
💡 Hint: Think about what happens before something starts to move.
True or False: Rolling friction is generally greater than sliding friction.
💡 Hint: Think about how easy it is to roll versus slide an object.
1 more question available
Challenge Problems
Push your limits with advanced challenges
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.
💡 Hint: Think about the transition from still to movement.
Design an experiment to demonstrate the effect of lubricants on friction, including variables and expected outcomes.
💡 Hint: Consider different types of lubricants and surfaces.
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