Momentum

• What should you be able to calculate by the end of the video?

  Momentum
• What is the momentum of an object that is not moving?

  Zero
• Why is it important to learn that stationary objects have no momentum?

  It's often asked in exams
• How is momentum calculated?

  Mass multiplied by velocity
• What is the unit of momentum?

  Kilogram m/s
• Why do you need to learn the momentum equation for the exam?

  It is not provided in the exam
• If a car has a mass of 1,000 kg and is not moving, what is its momentum?

  Zero
• Calculate the momentum of a car with a mass of 1,000 kg moving at 20 m/s.

  20,000 kg m/s
• What is the conservation of momentum?

  Total momentum before equals after an event
• What happens to the momentum of a van and a stationary car during a collision?

  • Van has momentum before collision
  • Stationary car has zero momentum
  • After collision, total momentum is conserved
• How does the momentum of the cannon and cannonball behave when the cannon fires?

  Momentum before firing is zero, after is zero
• What are the key points about momentum conservation in the cannon example?

  • Both cannon and cannonball start at rest
  • Total momentum before firing is zero
  • Cannonball moves forward, cannon recoils backward
  • Total momentum after firing remains zero
• Where can you find more questions on momentum?

  In the vision workbook