Try the new HTML5 iPad-compatible Forces and Motion: Basics simulation. Explore the forces at work in a tug of war or pushing a refrigerator, crate, or person. Create an applied force and see how it makes objects move. Change friction and see how it affects the motion of objects.
Like our tablet-compatible simulations? Support bringing Circuit Construction Kit to iPads: http://www.crowdrise.com/PhETHTML5CCKSimulation
Or support building the “Teach with PhET” website: http://www.crowdrise.com/helpbuildteachwithphet
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