Momentum

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

  The momentum of a non-moving object is zero.
• How is momentum calculated?

  Momentum is calculated using the equation: momentum = mass × velocity.
• What is the unit of momentum?

  The unit of momentum is kilogram m/s.
• If a car has a mass of 1,000 kg and is not moving, what is its momentum?

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

  The momentum is $20,000 \text{ kg m/s}$.
• What is the principle of conservation of momentum?

  • In a closed system, the total momentum before an event equals the total momentum after the event.
  • Momentum is conserved during collisions and interactions.
• What happens to the momentum of a van and a stationary car during a collision?

  The total momentum before the collision equals the total momentum after the collision.
• In the example of the van and the stationary car, what is the momentum of the stationary car before the collision?

  The momentum of the stationary car before the collision is zero.
• What happens to the momentum of a cannon and cannonball before and after firing?

  The total momentum before firing is zero, and the total momentum after firing is also zero.
• How does the momentum of the cannonball and the cannon relate after the cannon fires?

  The backward momentum of the cannon equals the forward momentum of the cannonball.
• Conservation of Momentum

  The total momentum of a closed system remains constant over time.
• What is the symbol equation for momentum?

  p = m v
• What is the principle of conservation of momentum?

  In a closed system, the total momentum before an event is equal to the total momentum after the event.
• What happens to momentum when a force acts on an object that is moving or able to move?

  A change in momentum occurs, where the force is the rate of change of momentum.