8787856
| Question | Answer |
| Particle | Mass, but no size |
| Rough/Smooth | Friction present/not present |
| Light | No Mass |
| Rigid body | Mass and Size, does not deform |
| Elastic/Inelastic | Deforms/does not deform |
| Plane | Flat surface (eg, a slope) |
| Vector quantities | Displacement Velocity Acceleration Force |
| Scalar quantities | Distance (m) Speed (ms^-1) (Magnitude of) acceleration (ms^-2) (Magnitude of) force (N) mass (kg) time (s) |
| Displacement-Time graph | Displacement = Height Velocity = Gradient |
| Velocity-Time graph | Displacement = Area Velocity = Height Acceleration = Gradient |
| SUVAT values | s = displacement (m) u = initial velocity (ms^-1) v = final velocity (ms^-1) a = acceleration (ms^-2) t = time (s) |
| SUVAT equations | v = u+at v^2 = u^2+2as s = 1/2(u+v)t s = ut+1/2at^2 s = vt-1/2at^2 |
| Manipulating vectors | [a] + [c] = [a+-c] [b] - [d] = [b+-d] k*[a] = [ka] [b] [kb] |
| Resolving vectors | F = [F cos A] [F sin A] A = angle |
| Kinematics in 2 dimensions | In 1 dimensional problems, direction is given as +ve or -ve In 2 dimensional problems, direction is defined by the vector |
| Equilibrium | A particle in equilibrium has constant velocity (could be at rest), and has a resultant force of 0N acting on it (forces are balanced) |
| Always true Friction | F<= uR |
| In motion or limiting friction | F = uR |
| Newton's second law | F = ma |
| Projectiles | Horizontal: v constant Vertical: a = -9.8, SUVAT equations |
| Conservation of momentum | m1u+m2u=m1v+m2v |
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