Momentum

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

  You should be able to calculate momentum.
• What is the momentum of an object that is not moving?

  The momentum is zero.
• What is the equation for calculating momentum?

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

  The unit of momentum is kilogram m/s.
• Is the equation for momentum provided in the exam?

  No, you need to learn it.
• If a car has a mass of 1,000 kg and is not moving, what is its momentum?

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

  Momentum = 1,000 kg × 20 m/s = 20,000 kg m/s.
• What is the principle of conservation of momentum?

  The total momentum before an event is equal to the total momentum after the event in a closed system.
• What happens to the momentum of a van and a stationary car during a collision?

  • The van has momentum before the collision.
  • The stationary car has no momentum.
  • After the collision, both move together with a lower velocity.
  • Total momentum before equals total momentum after.
• How does the cannon and cannonball demonstrate conservation of momentum?

  • Before firing, both cannon and cannonball have zero momentum.
  • After firing, the cannonball moves forward with momentum.
  • The cannon recoils backward with equal momentum.
  • Total momentum remains zero before and after firing.
• Where can you find more questions on momentum?

  You can find them in the vision workbook.
• Who is the target audience for the video?

  The video is for higher tier students only.
• What is the nature of momentum as a physical quantity?

  Momentum is a vector quantity, having both magnitude and direction.
• How can momentum change for an object?

  Momentum can change if either its mass or velocity changes.
• Why is the concept of momentum important in physics?

  It helps in understanding collisions and explosions.