Moments

• Momentum = mass x velocity

  p = mv

  kg m/s = kg x m/s
• Force = Change in momentum / time

  F = p/t

  N = kg m/s / s
• Momentum before = Momentum after
• Weight= mass x g

  W = mg

  N = kg x N/kg
• Moment = Force x Distance

  M = Fd

  Nm = N x m
• Pressure = Force / area

  P = F / a

  Pa = N / m2
• Hydraulic systems

  1. The pressure in liquids can be used in hydraulic systems

  • 2 pistons
  • 1 piston has a larger cross sectional area than the other piston
  • Pressure is transmitted equally through a liquid - so that the pressure at both pistons is the same