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Chapter 11, "Newton's Laws"Weightw = m g where m = mass and g = acceleration due to gravity ( “9.8m/s 2 on Earth). Newtons1N = 1kg*m/s 2 1N = 0.2248lbs Static FrictionF S = “ m S N where N is the normal force. Kinetic FrictionF K = “ m K N where N is the normal force. Free-Body Diagram
Newton's First LawIf F net = 0, no change in motion occurs. Newton's Second LawF net = m a where m is mass and a is acceleration. Newton's Third LawFor every force there is an equal and opposite force, or, when two objects come into contact, they exert equal and opposite forces upon each other. |
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