Physics
Double Award
Double Award
Cambridge IGCSE
(click here for simplified 'symbols only' version)
For ALL exam papers for Physics iGCSE:
| average speed = | total distance moved |
| total time taken |
| v = | s |
| t |
| acceleration = | change in velocity |
| time taken |
| a = | Δv |
| t |
| gravitational field strength = | weight |
| mass |
| g = | W |
| m |
| density = | mass |
| volume |
| ρ = | m |
| V |
force= mass x acceleration
F = m a
| Spring constant = | Force applied |
| extension |
| k = | F |
| x |
moment = force x perpendicular distance (from the pivot)
moment = F d
work done (change in energy) = force x distance moved (in direction of force)
W = ΔE = F d
| Power = | work done (or energy transferred) |
| time taken |
| P = | W (or ΔE) |
| t |
kinetic energy = ½ x mass x (speed)2
K.E. = ½ m v2
gravitational energy = mass x gravitational field strength x height
G.P.E. = m g h
| efficiency = | useful energy/power output | x 100% |
| total energy/power input |
| pressure |
= | force |
| area |
| p = | F |
| A |
wave velocity = frequency x wavelength
v = ƒ λ
| n = | sin i |
| sin r |
| current = | charge |
| time |
| I = | Q |
| t |
| resistance = | voltage |
| current |
| R = | V |
| I |
Rtotal = R1 + R2 + .....
| 1 | = | 1 | + | 1 |
| Rtotal | R1 | R2 |
power = current x voltage
P = I V
energy = current x voltage x time
E = I V t
| input (primary) voltage | = | number of primary turns |
| output (secondary) voltage | number of secondary turns |
| Vp | = | Np |
| Vs | Ns |
input power = output power
Vp Ip = Vs Is
power lost as heat = (current)2 x resistance
P = I2 R
| average orbital speed = | 2 x π x orbital radius |
| time period |
| v = | 2 π r |
| T |
