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Unformatted text preview: SOHCAHTOA [ ] [ ] [ ] [ ] [ ] 2 2 / v x L T L a t T T t = = = = 2 2 2 r x y = + 2 4 2 b b ac a ± f i X X X ∆ = . . . tot dist Avg Speed tot time = X V t ∆ = ∆ u v V a t ∆ = ∆ v 2 1 2 h at = D V T = ⋅ x a = 9.81 y a =  o V V at = + 2 1 2 o X V t at ∆ = + 2 2 2 f o V V a X = + ∆ 2 2 x y V V V = + 1 tan y x V V θ = cos x o o V V θ = sin y o o V V θ = F ma = ∑ u v w mg = Atwood’s Machine: 2 1 1 1 2 m m a g m m  = + 2 1 1 2 m m T g m m ⋅ = + s f F =  , , , s s F f F f ↑ ↑ ↓ ↓ k F f = max s s f f n μ = = ⋅ k k f n μ = ⋅ s k μ μ 1 2 ( ) T T mg + = To Find Largest Angle: ( 29 1 tan s θ μ = sin cos k incline a g g θ μ θ ↓ = ( 29 new o S g S a g = + 2 1 1 2 k m g m g a m m μ  = + Relative Velocity : the velocity of an object relative to the velocity of the observer AB AE BE V V V = AB AE BE r r r = ● AE r = position of car A as measured by E ● BE r = position of car B as measured by E ● AB r = position of car A as measured by car B Avg. Velocity: slope of a straight line connecting the final/initial points. Sig. Digits: +/ (smallest # of decimal places of any term) x/ (digits in final answer = # w/ the least digits). Dynamics: study of motion and physical concepts (force & mass). Kinematics : part of dynamics that describes motion w/o cause. Vector: magnitude and direction. Scalar: only magnitude. Newton’s 1 st Law: an object moves with a velocity that is constant in magnitude & direction, unless acted on by a NONZERO net force. “objects move b/c the opposite force is exherted on a diff. object then the one being moved”. Inertia : tendency of an object to continue in its original state of motion; it’s a property of matter to resist changes in motion. Mass : measure of an objects resistance to changes in its motion due to a force (kg) *greater the mass, the less it accelerates under a force, greater its inertia. Newton’s 2 nd Law: accel. of an object is directly proportional to the net force acting on it, inversely prop to its mass. Gravitational Force : mutual force of attraction btwn any 2 objects in the universe (weakest of all fundamental forces). Newton’s Law of Gravitation : every particle attracts every other particle w/ a force that is directly proportional to the product of the masses, inversely prop. to the square of the distance between them. Newton’s 3 rd Law: Forces in nature come in pairs. Force exerted by object 1 on 2 is equal to the opposite force exerted by object 2 on 1. (action – reaction). Tension: magnitude of the force exerted along a rope – it’s the same at all points on the rope....
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This note was uploaded on 02/09/2009 for the course PHY 320 taught by Professor Lui during the Spring '09 term at University of Texas at Austin.
 Spring '09
 LUI
 Heat

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