Equations revision

Equations revision

1. Equations

   • density = m/v
   • energy transferred = charge flow x potential difference
   • time = energy transferred/power
   • weight = mass x gravitational field strength
     • g = w/m
       • m= w/g
   • work done = force x distance
     • d = w/f
       • f = w/s
   • force = spring constant x extension
     • spring constant = f/e
       • e = f/ spring constant
   • moment = force x distance
     • f= m/ d
       • d= m/f
   • pressure = force/ area
     • f= p x a
       • a = f/p
   • distance = speed x time
     • v = d/t
       • t= d/v
   • acceleration = change in velocity/ time
     • CIV = a x t
       • t = CIV/ a
   • resultant force = mass x acceleration
     • m= f/a
       • a = f/m
   • momentum = mass x velocity
     • m = p (velocity) /m
       • v = p/m
   • kinetic energy = 0.5 x mass x velocity²
     • m = 2ek/ v²
       • v = (square root) 2ek/m
   • gpe = m x g x h
     • m= gpe/ (g x h )
       • g= gpe / (m x h)
         • h = gpe / (m x g)
   • power - energy transferred/ time
     • e = p x t
       • t= e/ p
   • power = work done/ time
     • w= p x t
       • t= w / p
   • efficiency= total input / useful output
     • useful output= efficiency x total input