1. Effective Study Review the material (mind map)
Talk physics (flash cards, focus)
Practise Questions (workbook or Exam)
Mark and correct (make notes)
Recommended Timing:
2.3 Waves (4 credits)
40 minutes
2.4 Mechanics (6 credits)
55 minutes
2.6 Electricity (6 credits)

2. Mechanics τ = Fd Circular Motion
Centripetal force: caused by friction or tension or gravity
Centripetal acceleration: due to a change in direction NOT speed
Vectors have direction
E 10° S
Velocity
Acceleration
Adding vectors using Pythagoras
Don’t forget the angle!
Energy
Separate vertical and horizontal motion
Mechanics
Torque (N m)
τ = Fd
Balance:
Clockwise torques = anticlockwise torques
Momentum
(kg ms-1)
p = mv
Always conserved (unless acted upon by an unbalanced force)
Impulse
Δp = Ft
1st: An object will travel at constant velocity unless acted on by an unbalanced resultant force
Newton’s Laws of Motion
3rd: Every action has an equal and opposite reaction
2nd: Unbalanced resultant force leads to an acceleration
F = ma
Friction and air resistance opposes motion

3. Waves v = fλ , T=1/f f is negative Di, Hi is negative Reflection
Longitudinal and Transverse
Total Internal Reflection at critical angle
Electromagnetic Spectrum
Diverging
Converging
Mirrors & Lenses
Refraction: TAG AGA
f is positive
Di, Hi is positive
Diffraction, max if λ = gap
longer λ get diffracted more
Waves
Ray Diagrams
Superposition & Interference
Standing Waves
Interference pattern
Constructive (max amp) & destructive (min amp)

4. Electricity Series and Parallel circuit rules Voltage, V, Volts
Uniform Electric Field, E
Resistance, R, Ohms
Current, I, Amps
Electric potential energy, ΔE
Static Electricity
Energy, E, Joules
DC Electricity
Power, P, Watts
Force on a charge in an E-field
Electricity
Ohm’s Law graphs (V/I)
Induced voltage generated across a conductor moving in a B-field & Generators
Electromagnetism
Force on a charged particle in a B-field
DC Motor
Force on a current carrying conductor in a B-field (motor effect)