Momentum

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

  Zero
• What is the equation to calculate momentum?

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

  Kilogram m/s
• Is the momentum equation provided in the exam?

  No
• 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
• In a closed system, what happens to momentum during an event?

  It is conserved
• What happens to the momentum of a van and a stationary car after a collision?

  Total momentum remains the same
• What is the momentum of a stationary car before a collision?

  Zero
• What happens to the momentum of a cannon and cannonball after firing?

  Total momentum remains zero
• How does the momentum of the cannonball compare to the cannon after firing?

  They are equal and opposite
• What are the key facts about momentum?

  • All moving objects have momentum.
  • Non-moving objects have zero momentum.
  • Momentum is calculated as mass × velocity.
  • The unit of momentum is kg m/s.
  • Momentum is conserved in closed systems.
• What are the implications of conservation of momentum in collisions?

  • Total momentum before collision equals after.
  • Momentum can be transferred between objects.
  • Momentum is conserved in all closed systems.