Physics: Unit 2

Physics: Unit 2

Vectors, Motion & Energy
1. Vector
  1. Mag + Dir
  2. Position
    1. Displacement
      1. Velocity
        Acceleration
        Gravity: 9.8 m/s^2 down
        a = (v-u)/t
        v(ave) = s/t
      2. Rectilinear Motion
        s = ut + 1/2 at^2
        v^2 = u^2 = 2.a.s
    2. Sign Convention
2. Scalar
  1. Mag only
  2. Speed, mass
3. Energy + Work
  1. Ek
    1. 1/2 . m . v^2
  2. Ep
    1. m.g.h
  3. Work
    1. = F.s
    2. Work = Ep = Ek
    3. Power
      1. W/T
      2. F.V(ave)
Forces
1. Newtons Law of Motion
  1. 2nd: F = m.a
    1. Momentum (p)
      1. Impulse
        Anotações:
        change
        mv-mu
        F.t
        Damage
        Collisions
        Rebounds
        Follow through
      2. Conservation of p
        Net( initial) = Net( FInal)
      3. mv or mu
  2. 1st: Inertia
    1. Body remains in state of motion or at rest until acted on by net unbal force
    2. = Weight
      1. Mass X Grav
      2. Apparent: m.(g x (a-floor))
  3. 3rd: Every action has equal and opposite reaction
    1. F(a on b) = F(b on a)
      1. Rockets, Walking
    2. Friction
      1. Electrostatic
        parallel
        against and with
      2. = k.N
      3. Drag
      4. terminal
2. Mass
  1. amount of substance
3. Newtons
4. Normal F
  1. electrostatic
    1. != 3rd
    2. perpendicular
5. g = 9.8 m.s^2 down
6. AT an angle
  1. SOH-CAH-TOA
  2. Fsope = W.t x sine(θ)
Waves
1. Periodic, No Trasfer of matter
  1. Transverse
    1. Perpendicular
  2. Longitudinal
    1. Parallet
  3. Properties
    1. V m/s
      1. = f . λ
      2. = λ /T
    2. Frequency Hz
    3. WaveLength λ
    4. T (period) s
    5. Amplitude
      1. Max min displacement or pressure
  4. Charasteristices
    1. Refract
      1. BEND
    2. Defract
      1. SPREAD?
    3. Reflect
      1. BOUNCE
      2. Total Internal Reflection
  5. Super Positon
    1. Constructive
    2. Destructive
    3. Phase
      1. IN
      2. OUT
    4. Resonance
      1. Forcing Hz = Natural Hz
      2. Beat
        |F1 - F2|
    5. PAth Difference
      1. Loud, Soft
      2. 1/2 λ or even
    6. Standing Wave
      1. Identical
      2. Opposite dir
      3. Same medium
      4. Nodes
      5. Anti Nodes
        Internodal distance
        1/2 λ
      6. Air Column
        Open
        L = λ n/2
        Closed
        L = λn/4
        Odd
2. Machenical
  1. Sound
3. Electromagnetic
  1. Light
    1. 3 x 10^8
4. Wave Fronts
Errors
1. Accuracy
  1. Systematic
2. Precison
  1. Random
    1. Absolute error
    2. %age

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