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definition of friction A force that opposes motion between 2 surfaces that are touching
What are two factors that determine the amount of friction? the force pushing the surfaces together and the roughness of the surface.
what is acceleration? rate of velocity change over time
Give examples of balanced forces Sitting still on a still chair.
Give examples of unbanlenced foces bouncing a ball
what is a way to increase friction ? adding salt and sand to icy roads
What is a way to reduce friction ? use ice blades to skate so it melts a thin layer of water
give an example of how friction can be helpful wheels on a lawn mower make it easier to push the mower
give an example of how friction can be harmful friction between engine parts wears out the engine
what are 2 things do you have to know how to calculate speed? distance/time
what are the 2 kinds of frictions? static, and kinetic
What is kinetic friction? is moving friction
What is the 2 kinds of kinetic friction? rolling, and sliding
what is static friction? is a still friction
Created by: gs28885