Change in Momentum (T)

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

  Calculate the force acting on an object due to the change in momentum.
• Why are rapid changes in momentum considered dangerous?

  Because they can exert huge forces that may be lethal.
• How do safety features like seat belts reduce dangers associated with changes in momentum?

  • They slow down the change in momentum
  • They reduce the forces acting on passengers
  • They lower the risk of serious injury
• How is momentum calculated?

  Momentum is calculated by multiplying the mass of an object by its velocity.
• What is the formula for calculating force?

  Force equals mass multiplied by acceleration.
• How is acceleration calculated?

  Acceleration is calculated by dividing the change in velocity by the time taken.
• What does the equation for force represent in terms of momentum?

  It represents the change in momentum divided by time.
• If a man has a mass of 100 kilograms and the car comes to a stop in one second from a speed of 30 meters per second, what is the force acting on him?

  3000 Newtons.
• What are some safety devices that help slow down momentum change?

  • Airbags
  • Seatbelts
  • Crash mats
  • Bike helmets
  • Cushion surfaces in playgrounds
• How do safety devices like airbags and seatbelts function in relation to momentum?

  They reduce the forces acting on individuals by slowing down momentum change.