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5 cards from this section. Quick, good the night before a test.
What is friction?
Think about what happens when you try to slide something.
Name two types of friction.
One prevents movement, the other acts when moving.
What type of friction prevents motion from starting?
Think about a heavy object that won't budge.
True or False: Kinetic friction is weaker than static friction for most surfaces.
Consider what happens once an object is already moving.
A block weighing 20 N is pulled horizontally on a rough surface with a force of 10 N. Calculate the net force acting on the block and discuss the motion.
Identify the friction force based on roughness and normal force.
What happens to the frictional force when the surface area of contact increases, assuming weight stays the same? Analyze the change in friction.
Consider how friction is calculated and which factors are important.
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