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A science that studies the natural world. 


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motion, energy + work, newton's law, harmonic motion 


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system international  standards length, time, mass
Prefix Notation nano  10^9 micro  10^6 milli  10^3 centi  10^2 deka  10 kilo  10^3 mega  10^6 giga  10^9 tera  10^12 


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scientific method Observation, Hypothesis, Experiment, Conclusion 


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shorthand form when working with big or small numbers 


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predicting a value within the range of the data 


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predicting a value outside the range of data 


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"k" inverse, quadratic, linear 

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inverse  y=k/x  k=xy quadratic  y=kx^2  k= y/x^2 linear  y=kx  k= y/x 


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k = slope change in y/ change in x y2y1/x2x1 do not use data points 


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change in x  xfxi  distance change in t  tfti  time speed: change in x/ change in t 


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specify magnitude + direction velocity, acceleration, force 


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you only need to specify magnitude 


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sin@ = side opps/ hypotenuse cos@ = side adj/ hypotenuse tan@ = side opps/ side adj 


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c^2 = a^2 + b^2  2ab(cos@c) 


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sin@A/A = sin@B/B = sin@C/C 


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An object at rest remains at rest, an object in motion continues in motion, unless acted on by an outside force 


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property described by 1st law 


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characterizes inertia  quantity of matter (kg) 


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W(weight (N)) =(mass (kg))g(9.8 m/s^2) 


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F = ma acc. is directly porportional to force/ inversly porportional to mass 


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oppose motion when objects are in contact 


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restoring form  brings back to equillibrium back to where we started 


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represents forces that act on an object 


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Equillibrium  sum of the forces add to zero 


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Tension and weight formula 

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tension  weight = m tension = w + ma L  w = ma 


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Ms  static coefficient Mk  kinetic coefficient m = Ff/ N Ff = u(nu)N 


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m2>m1 m2g  T = m2a T  m1g = m1a
m2g  m1g = m2 + m1a
a = (m2  m1) g/ m2 + m1 


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E(sigma) Fx = 0 E(sigma) Fy = 0 T1cos@ + T2cos@ = 0 T2 = T1 T1sin@ + T2sin@ = 0 2Tsin@ = W?
smaller @ = bigger tension 


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An object that is effected by gravity after it is given an initial velocity
The horizontal motion of a projectile is independent of the vertical motion 


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when acceleration is directed to the center 


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Ac centripetal acceleration formula 

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mv^2/R = Fc = (4pi^2R/T^2)m 


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had 3 laws of planetary motion



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1st law  paths of planets are ellipses 2nd law  a law from the planet to the sun sweeps out equal areas in equal times 


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t^2 = kRave^3
k = t^2/ Rave^3 = 1y^2/ 1a.u.^3
F = G(m1m2/R^2) G = 6.67x10^11 


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Finding "g" on another planet 

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