Physics Equations

weight = mass x gravitational field strength

W = mg

work done = force x distance (along the line of action of the force)

W = Fs

force applied to a spring = spring constant x extension

F = ke

distance travelled = speed x time

s = vt

resultant force = mass x acceleration

F = ma

gravitational potential energy = mass x gravitational field strength x height

Ep = mgh

momentum = mass x velocity

p = mv

kinetic energy = 0.5 x mass x velocity^2

Ek = 0.5mv^2

acceleration = change in velocity / time taken

a = Δv / t

power = energy transferred / time

P = E / t

power = work done / time

P = W / t

efficiency = useful output energy transfer / total input energy transfer

efficiency = useful power output / total power input

wave speed = frequency x wave length

v = fλ

charge flow = current x time

Q = It

potential difference = current x resistance

V = IR

power = potential difference x current

P = VI

power = current^2 x resistance

P = I^2 R

energy transferred = power x time

E = Pt

energy transferred = charge flow x potential difference

E = QV

density = mass / volume

p = m / v