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
• 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 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 total after
• How does the momentum of the van and car change during a collision?

  Total momentum remains the same
• What happens to the momentum of the cannon and cannonball before firing?

  Total momentum is zero
• How does the momentum of the cannonball relate to the cannon's momentum after firing?

  They are equal and opposite
• What occurs to the cannon's momentum when it fires the cannonball?

  Cannon recoils backwards
• What is the total momentum after the cannon fires?

  Zero
• What are the key facts about momentum that students should remember?

  • All moving objects have momentum.
  • Objects not moving have zero momentum.
  • Momentum is calculated as mass × velocity.
  • The unit of momentum is kilogram m/s.
  • Conservation of momentum states total before equals total after.
• What are the steps to calculate momentum in a problem?

  1. Identify the mass of the object.
  2. Determine the velocity of the object.
  3. Use the equation: Momentum = mass × velocity.
  4. State the result in units of kg m/s.