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Physics Test Review Sheet Unit Objectives As a result of this unit, I will… I will understand key physics vocabulary, including: acceleration average velocity centrifugal deceleration law of acceleration law of action and reaction momentum motion uniform circular motion actual mechanical advantage effort force fixed pulley horsepower inclined plane foot-pound ideal machine work output law of machines lever machine Joule centripetal speed movable pulley newton-meter pitch pulley simple machine resistance force second-class lever watt wedge Bernouilli’s Principle law of inertia velocity first-class lever work third-class lever mechanical advantage work input power screw wheel-and-axle I will understand key physics concepts, including Formulas d= t x s s=d/t Work = effort x distance P= (FxD)/T d=1/2 g x t2 Vf=g x t where g = 32 ft/sec.2 or g = 9.8 m/sec.2 Power = work / time W= FxD F=MxA 1. Newton’s 1st Law of Motion, Law of Inertia 2. Newton’s 2nd Law of Motion, F=MA 3. Newton’s 3rd Law of Motion, Equal and Opposite Forces MA = the number of ropes –1 is the formula for the MA of pulley. MA = Single moveable pulley is 2 MA = effort arm length = is the formula for the MA of lever. resistance arm length MA = effort distance = length = is the formula for the MA of inclined plane . resistance dist. height MA = more threads = higher MA is the rule for the MA of screw . Fewer threads = lower MA MA = wheel diameter = is the formula for the MA of Wheel and Axle. axle diameter Lever Classes: