IGCSE Physics 0654 ALL EQUATIONS + UNITS REVISION

speed equation

distance/time

acceleration equation

change in velocity / change in time

change in velocity

final velocity - initial velocity

acceleration unit

meter per second squared (m/s^2)

velocity unit

meter per second (m/s)

acceleration of freefall

9.8 m/s^2

weight equation

mass x gravitational field strength

weight unit

newtons (n)

mass unit

kilograms (kg)

gravitational field strength unit

newtons per kilogram (N/kg)

density equation

mass / volume

density unit

kilograms per metre cubed (kg/m^3)

volume unit

meter cubed (m^3)

force equation

mass x acceleration

force (hooke's law equation) [F]

spring constant x extension [kx]

spring constant unit

newton per metre (N/m)

moments equation

force x perpendicular distance from pivot

moments unit

newton meters (Nm)

kinetic energy equation

1/2 x mass x speed squared

kinetic energy unit

joules

gravitational potential energy equation

mass x gravitational field strength x height change

gravitational potential energy unit

joules (J)

work done equation

force x distance travelled

work done units

newton meters (Nm)

work done equals

energy transferred

power equation

work done or energy transferred / time

power units

watts (W)

efficiency equation

useful energy output / total energy input x100

wavespeed

frequency x wavelength

wave frequency unit

hertz (Hz)

refractive index equation

sin i / sin r

charge equation

current x time

angle of incidence (i)

angle of reflection (r)

refractive index equation 2

speed of light in a vacuum / speed of light in a material

charge unit

coulomb (C)

current unit

amps (A)

resistance equation (ohm's law)

potential difference OR EMF / current

potential difference unit

volts (V)

resistance unit

ohms (Ω)

electrical energy equation

potential difference x current x time

energy unit

joules (J)

primary coil voltage / secondary coil voltage

primary coil turns / secondary coil turns

light speed

3 x 10^8 m/s

orbital speed equation

2 x pi x orbital radius / orbital time period

orbital speed unit

meters per second (m/s)