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
• What is the equation for calculating momentum?

  Momentum = mass × velocity
• What is the unit of momentum?

  kilogram m/s
• Why is it important to learn the momentum equation?

  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
• How do you calculate the momentum of a car with a mass of 1,000 kg moving at 20 m/s?

  1,000 kg × 20 m/s
• What is the momentum of a car moving at 20 m/s with a mass of 1,000 kg?

  20,000 kg m/s
• What does the conservation of momentum state in a closed system?

  Total momentum before equals total after
• In the example of the van and the stationary car, what happens to their momentum after the collision?

  It is conserved
• What happens to the momentum of the cannon and cannonball before firing?

  Total momentum is zero
• After the cannon fires, what is the total momentum of the cannon and cannonball?

  Zero
• How does the cannon's recoil relate to the cannonball's momentum?

  It equals the cannonball's momentum
• What are the key concepts of momentum discussed in the video?

  • Definition of momentum
  • Calculation of momentum
  • Conservation of momentum
  • Examples of momentum in collisions
• What are the steps to calculate momentum?

  1. Identify mass of the object
  2. Identify velocity of the object
  3. Use the equation: Momentum = mass × velocity