momentum

• what is momentum

  • momentum is any object that is moving/in motion
  • momentum (kg/s) = mass(kg) x velocity(m/s)
• what is the principle of momentum

  • the total momentum before a collision is equal to the total momentum after a collision
• if two objects collide,one is stationary and one in motion,the one in motion moves backwards(left) while the stationary moves forward(right) how is momentum conserved

  • the stationary object has no momentum as it isn't moving while the object in motion does have momentum as it is moving so total momentum before collision = mass x velocity of moving object,
  • after collision the moving object velocity is negative as it acts in the opposite direction while the objects that moves has a psitive momentum
  • momentum after = mass of 1 x - velocity + mass of 2 x + velocity
• how can momentum be altered

  • if an object speeds up/slows down
  • direction changes
  • mass changes
• what is an elastic collision

  • objects that collide and move in opposite directions and different final velocity
• what is an inelastic collisions

  • objects that collide and move in the same direction where both masses combine and have the same final velocity
• how does momentum relate to force

  • a force acts on an object causing it to accelerate or decelerate
  • this force is equal to change in momentum / time
  • the longer the impact of the or momentum the smaller the force
• what is inertia mass

  the ratio of force / accleration and is a measure of how difficult it is to change an objects velocity

  mass = force/accleration
• how is the equation of inertia mass applied

  • for a given force the accleration is inversely proportional to it's mass
  • large inertial mass experience a slower accleration
  • bigger inertial mass experience a larger accleration