Physics Igcse Formulae

Front 1

Average Speed

Back 1

Distance (m)
Time (s)

Front 2

Acceleration

Back 2

Gain of Velocity (m/s)
Time (s)

Front 3

Distance Travelled

Back 3

Distance under velocity-time graph

Front 4

Acceleration

Back 4

Gradient of velocity-time graph

Front 5

Force (N)

Back 5

Mass (kg) x Acceleration (m/s^2)

Front 6

Momentum Before

Back 6

Momentum After

Front 7

Momentum (kgm/s)

Back 7

Mass (kg) x Velocity (m/s)

Front 8

Force (not F=ma)

Back 8

Change of Momentum
Time

Front 9

Gravitational Potential Energy

Back 9

Mass (kg) x Gravity (N/kg) x Height (m)

Front 10

Kinetic Energy (J)

Back 10

1/2mv^2

Front 11

Weight (N)

Back 11

Mass (kg) x Gravity (N/kg)

Front 12

Work Done (J)

Back 12

Force (N) x Distance (m)

Front 13

Power (W)

Back 13

Energy Transferred (J)
Time Taken (s)

Front 14

Moment of a Force (Nm)

Back 14

Force (N) x Perp. Distance from pivot (m)

Front 15

For an object to be in equilibrium (2)

Back 15

Net force on object = 0
Total clockwise moment = Total anticlockwise moment

Front 16

Circular Orbital Speed

Back 16

2 x π x orbital radius
Time period of orbit

Front 17

Density (kg/m^3)

Back 17

Mass (kg)
Volume (m^3)

Front 18

Pressure (N/m^2)

Back 18

Force (N)
Area (m^2)

Front 19

Pressure caused by depth in fluid

Back 19

P = ρ (kg/m^3) x g (N/kg) x h (m)

Front 20

Boyle's Law for Fixed mass of gas at constant temperature

Back 20

pressure x volume = constant
P1V1 = P2V2

Front 21

Pressure law for fixed mass of gas at constant volume

Back 21

pressure = constant
temperature in Kelvin

P1 = P2

T1 T2

Front 22

Efficiency

Back 22

Useful Energy Output

Total Energy Input

Front 23

Charge Passed (C)

Back 23

Current (A) x Voltage (V)

Front 24

Potential Difference (V)

Back 24

Energy Transferred (J)

Charge Passed (C)

Front 25

Resistance (Ω)

Back 25

Voltage (V)

Current (A)

Front 26

Electrical Power (W)

Back 26

Current (A) x Voltage (V)

Front 27

Electrical Energy (J)

Back 27

Current (A) x Voltage (V) x Time (s)

Front 28

Total Resistance (for series resistors)

Back 28

sum of resistances

Front 29

Voltage across primary

Voltage across secondary

(For an ideal transformer)

Back 29

Turns on primary

Turns on secondary

Front 30

Input power

(For an ideal transformer)

Back 30

Output power

Front 31

For a wave,

Speed (m/s)

Back 31

Frequency (Hz) x Wavelength (m)

Front 32

For a wave,

Frequency (Hz)

Back 32

1
Period (s)

Front 33

For a reflected light ray,

Angle of incidence

Back 33

Angle of reflection

Front 34

For a refracted light ray,

Refractive index n =

Back 34

sin i

sin r

Front 35

For total internal reflection,

Critical angle c =

Back 35

1

n