Physics equations

speed

distance/ time

v = s/t

acceleration

change in velocity/ time

a = (v-u)/ t

(final speed)²

(initial speed)² + (2 x acceleration x distance moved)

v² = u² + 2as

force

mass x acceleration

F = m x a

weight

mass x gravitational field strength

W = m x g

wave speed

frequency x wavelength

v = f xλ

frequency

1/ period

1/T

refractive index

sin(angle of incidence)/ sin (angle of refraction)

n = sin i/ sin r

sin(critical angle)

1/ refractive index

sin c = 1/n

efficiency

useful energy output/ total energy output x 100

work done

force x distance

W = F x d

gravitational potential energy

mass x gravitational field strength x height

GPE = m x g x h

Kinetic energy

½ x mass x speed²

KE = ½ x m x v²

Power

work done/ time

P = w/t