Effective Study

1. Effective Study • Review the material (mind map) • Talk physics (flash cards, focus) • Practise Questions (workbook or Exam) • Mark and correct (make notes) • Timing:

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

3. 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. 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)