# Physics iGCSE Equations

All of the equations that you need in the Physics iGCSE.

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• Created by: cleomos
• Created on: 01-05-16 12:05
Density
mass / volume
1 of 32
Average speed
distance moved / time taken
2 of 32
Average acceleration
change in velocity / time taken
3 of 32
Force
mass x acceleration
4 of 32
Weight
mass x (g)
5 of 32
Moment of a force about a point
force x perpendicular distance from point
6 of 32
spring constant x extension
7 of 32
Pressure (force)
force / area
8 of 32
Pressure (liquid)
density x (g) x depth
9 of 32
Kelvin temperature
temperature in celsius + 273
10 of 32
Boyle's Law (constant temp.)
P1 x V1 = P2 x V2
11 of 32
Heating gases (constant vol.)
P1 / T1 = P2 / T2
12 of 32
Work done
force x distance moved in direction of force
13 of 32
Gravitational potential energy
mass x (g) x height
14 of 32
Kinetic energy
1/2 x mass x velocity squared
15 of 32
Energy transferred (temp. change)
mass x specific heat capacity x temp. change
16 of 32
Energy transferred (state change)
mass x specific latent heat
17 of 32
Power
work done / time taken = energy transformed / time taken
18 of 32
Efficiency
useful work (or power or energy) done (or output) / total energy (or power) input
19 of 32
Speed of waves
frequency x wavelength
20 of 32
Frequency
1 / period
21 of 32
Refractive index (refraction of light)
sin of angle of incidence / sin of angle of refraction
22 of 32
Sin of critical angel (total internal reflection)
1 / reflective index
23 of 32
Charge
current x time
24 of 32
Resistance
Voltage (PD) / current
25 of 32
Total resistance (series)
R1 + R2
26 of 32
Total resistance (parallel)
1/R1 + 1/R2
27 of 32
Electrical power
voltage (PD) x current
28 of 32
Electrical energy
power x time OR voltage (PD) x current x time
29 of 32
Transformers
output voltage / input voltage = output turns / input turns
30 of 32
100% efficient transformer (power input)
power input = power output
31 of 32
Grams
10N/kg OR 10m/s(squared)
32 of 32

## Other cards in this set

### Card 2

#### Front

distance moved / time taken

Average speed

### Card 3

#### Front

change in velocity / time taken

### Card 4

#### Front

mass x acceleration

mass x (g)