The top documents tagged [friction contact force]

3rd Grade Ch. 12 lesson 2 how does force affect motion

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What is Friction ( contact force ) Force that acts when two objects rub (contact) each other Friction comes from solid, air or water //phet.colorado.edu/sims/friction/friction_en.html.

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3rd Grade-Ch. 12 Lesson 2 How does force affect motion

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4.481 views