Physics: Unit 2

Physics: Unit 2

1. Vectors, Motion & Energy

   • Vector
     • Mag + Dir
     • Position
       • Displacement
         • Velocity
           • Acceleration
             • Gravity: 9.8 m/s^2 down
             • a = (v-u)/t
           • v(ave) = s/t
         • Rectilinear Motion
           • s = ut + 1/2 at^2
           • v^2 = u^2 = 2.a.s
       • Sign Convention
   • Scalar
     • Mag only
     • Speed, mass
   • Energy + Work
     • Ek
       • 1/2 . m . v^2
     • Ep
       • m.g.h
     • Work
       • = F.s
       • Work = Ep = Ek
       • Power
         • W/T
         • F.V(ave)

2. Forces

   • Newtons Law of Motion
     • 2nd: F = m.a
       • Momentum (p)
         • Impulse
           • change
           • mv-mu
           • F.t
             • Damage
           • Collisions
             • Rebounds
             • Follow through
         • Conservation of p
           • Net( initial) = Net( FInal)
         • mv or mu
     • 1st: Inertia
       • Body remains in state of motion or at rest until acted on by net unbal force
       • = Weight
         • Mass X Grav
         • Apparent: m.(g x (a-floor))
     • 3rd: Every action has equal and opposite reaction
       • F(a on b) = F(b on a)
         • Rockets, Walking
       • Friction
         • Electrostatic
           • parallel
             • against and with
         • = k.N
         • Drag
         • terminal
   • Mass
     • amount of substance
   • Newtons
   • Normal F
     • electrostatic
       • != 3rd
       • perpendicular
   • g = 9.8 m.s^2 down
   • AT an angle
     • SOH-CAH-TOA
     • Fsope = W.t x sine(θ)

3. Waves

   • Periodic, No Trasfer of matter
     • Transverse
       • Perpendicular
     • Longitudinal
       • Parallet
     • Properties
       • V m/s
         • = f . λ
         • = λ /T
       • Frequency Hz
       • WaveLength λ
       • T (period) s
       • Amplitude
         • Max min displacement or pressure
     • Charasteristices
       • Refract
         • BEND
       • Defract
         • SPREAD?
       • Reflect
         • BOUNCE
         • Total Internal Reflection
     • Super Positon
       • Constructive
       • Destructive
       • Phase
         • IN
         • OUT
       • Resonance
         • Forcing Hz = Natural Hz
         • Beat
           • |F1 - F2|
       • PAth Difference
         • Loud, Soft
         • 1/2 λ or even
       • Standing Wave
         • Identical
         • Opposite dir
         • Same medium
         • Nodes
         • Anti Nodes
           • Internodal distance
             • 1/2 λ
         • Air Column
           • Open
             • L = λ n/2
           • Closed
             • L = λn/4
             • Odd
   • Machenical
     • Sound
   • Electromagnetic
     • Light
       • 3 x 10^8
   • Wave Fronts

4. Errors

   • Accuracy
     • Systematic
   • Precison
     • Random
       • Absolute error
       • %age