Forces and friction
http://physics.bu.edu/~duffy/HTML5/force_motion_1D_friction.html
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Category: Newton’s 2nd Law
Investigate F = ma with/without friction
http://www.physicsclassroom.com/Physics-Interactives/Newtons-Laws/Force/Force-Exercise-1
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Categories
Atwood machine
Change masses, friction, measure time
http://www.physicsclassroom.com/Physics-Interactives/Newtons-Laws/Atwoods-Machine
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Categories
Forces and motion basics
Forces, Newton’s Laws, friction
https://phet.colorado.edu/en/simulation/forces-and-motion-basics
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Helen rates this resource as Excellent
Categories
Atwood Machine Lab
Atwood machine
http://www.thephysicsaviary.com/Physics/Programs/Labs/AtwoodLab/index.html
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Forces on a ramp – parallel
https://serc.carleton.edu/dmvideos/players/force_parallel_.html?hide_banner=true
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Categories
Atwood’s machine
Atwood machine
http://physics.bu.edu/~duffy/HTML5/Atwoods_machine.html
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Forces on a ramp – perpendicular
https://serc.carleton.edu/dmvideos/players/force_normal_ra.html?hide_banner=true
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Atwood machine
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Categories
Balancing Act
Moments
https://phet.colorado.edu/sims/html/balancing-act/latest/balancing-act_en.html
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