Edexcel iGCSE Y9-10 DA - Energy, Forces, Waves, Electricity and SLG symbol equations and units

v=

d/t

a=

(v-u)/t

v_average=

(v+u)/2

F=

ma

W=

mg

v^2 =

u^2 + 2as

Efficiency =

useful output energy/total input energy

W.D =

Fd

P=

W.D/t

KE=

1/2mv^2

GPE=

mgh

v=

λf

T=

1/f

Law of reflection

Angle of incidence = angle of reflection

n=

sin i / sin r

V=

IR

Q=

It

V=

E/Q

E=

VIt

P=

IV

ρ=

m/V

p=

F/A

Δp=

ρgh

Standard units for distance

metres (m)

Standard units for time

seconds (s)

Standard units for speed (or velocity)

meters per second (m/s)

Standard units for acceleration

metres per second squared (m/s^2)

Standard units for weight

Newtons (N)

Standard units for mass

kilograms (Kg)

Value for gravitational field strength

10 N/kg or 10 m/s^2

Standard units for force

newtons (N)

Standard units for energy

Jjules (J)

Standard units for work done

joules (J)

Standard units for Power

watts (W)

Standard units for frequency

hertz (Hz)

Standard units for time period

seconds (s)

Standard units for angles

degrees

Standard units for efficiency

no units

standard units for refractive index

no units

Standard units for chage

Coulombs (C)

Standard units for voltage

volts (V)

Standard units for current

amps (A)

Standard units for resistance

ohms (Ω)

Standard units for density

kilograms/metres cubed (kg/m^3)

Standard units for pressure

Newtons/metres squared (N/m^2)

Standard units for area

m^2

Standard units for height

metres (m)