Further motion

• Momentum


  A property linked to the motion of an object, depends on its mass and velocity, measured in kgm/s
• Momentum equation


  momentum = mass × velocity
• Momentum equation combined with force = mass × acceleration


  Gives a new equation for Newton's Second Law
• Newton's Second Law equation

  force = change in momentum / time
• Conservation of momentum


  Total momentum before a collision is equal to the total momentum after a collision, if there is no external force acting on the objects
• Equations of motion

  • v = u + at
  • x = (u + v)t/2
  • x = ut + 1/2 at^2
  • v^2 = u^2 + 2ax
• Moment


  A turning force, calculated as force × distance
• Mass is a measure of how much matter is present in an object.
• The weight of an object depends on both its mass and the strength of gravity acting upon it.
• Weight is the gravitational pull on an object due to its mass.