Physics Equations

Physics Equations

1. PAPER 1

   • work done = force x distance W = F x d
   • potential difference = current x resistance V = I R
   • charge = current x time Q = I t
   • efficiency = useful output / input Eff = Out / In
   • gravitational potential energy = mass x gravity x height Ep = m g h
   • kinetic energy = 0.5 x mass x (speed)2 Ek = ½ m v2
   • power = work done / time = energy / time P = W / t
   • power = potential difference x current P = V I
   • energy transferred = charge flow x potential difference E = Q V
   • power = (current)2 x resistance P = I2 R
   • density = mass / volume d = m / V

2. PAPER 2

   • moment = force x distance M = F d
   • distance = speed x time d = s t
   • acceleration = change in velocity / time taken a = v / t
   • weight = mass x gravity W = m g
   • force = spring constant x extension F = k e
   • force = mass x acceleration F = m a
   • momentum = mass x velocity p = m v
   • pressure = force / area p = F/A
   • wave speed = frequency x wavelength v = f 

3. If A = B C then B = A / C and C = A / B