Dynamics

• The Formula for Speed is V = d/t

  V = Speed (ms^-1)

  d = Distance (m)

  t = Time (seconds)
• The Formula for Displacement is s = Vt

  s = Displacement (m)

  V = Velocity (ms^-1)

  t = Time (Seconds)
• The Formula to work out the potential energy of an object is Ep = mgh

  m = Mass (kg)

  g = Gravitational Field Strength (Nkg^-1)

  h = Height (m)
• The gravitational field strength on the surface of Mars is about half that on the surface of Earth
• The gravitational field strength on the surface of Venus is about twice that on the surface of Earth
• Gravity is a force which pulls objects together due to their mass
• The gravitational field strength decreases with increasing altitude above the surface of the planet
• The less Massive an object is, the more the force of air resistance slows the object down as it falls.