Weight

W

Weight = mass x gravitational field strength

W = m x g

Work done

W

Work Done = force x distance (along line of action)

W = F x s

Force applied to a spring

F

Force applied to a spring = spring constant x extension

F = k x e

(Physics Only) Moment of a force

Moment = force x distance

M = F x d

(Physics Only) Pressure

P

Pressure = force normal to a surface / area of that surface

P = F / A

Distance travelled

s

Distance = speed x time

s = v x t

Force

F

Force = mass x acceleration

F = m x a

Acceleration

a

Acceleration = change in velocity / time taken

a = Δv / t

Momentum

p

Momentum = mass x velocity

p = m x v

Kinetic energy

E_{k}

Kinetic Energy = 1/2 x mass x (velocity)^{2}

E_{k }= 1/2 x m x v^{2}

Gravitational potential energy

E_{p}

Gravitational Potential Energy = mass x gravitational field strength x height

E_{p} = m x g x h

Power

P

Power = energy transferred / time

P = E / t

Power

P

Power = work done / time

P = W / t

Power

P

Power = potential difference x current

P = I x V

Power

P

Power = current^{2} x resistance

P = I^{2} x R

Efficiency (Energy)

= Useful output energy transfer / total input energy transfer

Efficiency (power)

= useful power output / total power input

Wave speed

v

Wavespeed = Frequency x wavelength

v = f x λ

Charge flow

Q

Charge flow = current x time

Q = I x t

Potential difference

V

Potential Difference = current x resistance

V = I x R

Energy transferred

E

Energy = power x time

E = p x t

Energy transferred

E

Energy transferred = charge flow x potential difference

E = Q x V

Density

ρ

Density = mass / volume

ρ = m / V