Solve Quadratic Equations by Factorization or Formula
Linear Simultaneous Equation
Equations of Constant Acceleration (5 SUVAT)
Distance - time Graph (Gradient)
Velocity - time Graph (Gradient, Area)
Trigonometry of Right-angled triangles
Sine Rule and Cosine Rule
Given one Trig Ratio, finding others
sine^2 x + con^2 x (trig identity)
tan x = sine x / cos x
Definition of Force, F=ma
Weight, w = mg
Reaction of Force or Normal
Resolution of Forces (Triangle Law of Vectors Addition)
Direction choices are usually Horizontally and Vertically, Parallel and Perpendicular to slope, or Parallel and Perpendicular to direction of motion
Resolving perpendicular to an unknown force means the unknown will not appear in the equation.
When direction of acceleration is unknown, it is normally best to find components of a resultant force and use them to find direction of magnitude of resultant.
Force resolution and Newton Second Law
Limiting Friction and R, mu
Total contact force is the combination of normal contact force and friction
If situation becomes different because a force a force changes or direction of motion switches, the normal contact force may be affected, so the friction may change. It is best to draw a new diagram every time a different situation arises.
Resolve forces in equilibrium and deal with non-equilibrium problems.