Balancing Act Phet Lab Answers -

phet free online physics chemistry biology earth - what is phet founded in 2002 by nobel laureate carl wieman the phet interactive simulations project at the university of colorado boulder creates free interactive math and science simulations, forces and motion basics force motion friction - explore the forces at work when pulling against a cart and 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