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• Momentum is mass in motion
• Mass is a scalar quantity
• Velocity is a vector quantity
• A box that weight 10kg will slide along at a pace of 5m/s. What is the momentum?

  p = mv

  p = 10(5)

  p = +50kg(m/s)
• If the same box from earlier now weighed 20kg and slid at pace of 3m/s in the opposite direction, what would be the momentum?

  p = mv

  p = 20kg(-3m/s)

  p = -60kg(m/s)
• Impulse is force x time
• There is a box weighing 50kg being pushed to the right with a force of 200N for 5 seconds while the initial velocity is 10m/s. What is the impulse?

  I = Force x Time

  I = (200N)(5s)

  I = 1000N(s)
• There is a box weighing 50kg being pushed to the right with a force of 200N for 5 seconds while the initial velocity is 10m/s. What is the change in momentum?

  I = change in momentum

  I = 1000kg(m/s)
• The total energy of a closed system is conserved
• Mechanical energy is conserved
• Mechanical energy is constant
• Non-Mechanical Energy forms include

  • chemical
  • thermal
  • nuclear
  • electrical
  • acoustic
• Collisions are when an object in motion comes into contact with another object
• In elastic collisions, total kinetic energy and momentum are conserved
• Perfectly inelastic collisions are when the objects become one mass
• In perfectly inelastic collisions, total momentum is conserved but kinetic energy is not conserved