mometum 2

Cards (22)

  • What can forces do to an object?
    Speed up or slow down the object
  • What is momentum equal to?
    Mass times velocity
  • If a two-kilo particle travels at five meters per second, what is its momentum?
    10 kilogram meters per second
  • What happens to momentum when a force is applied in the direction of travel?
    Momentum increases due to acceleration
  • What is the new momentum of a two-kilo particle traveling at eight meters per second?
    16 kilogram meters per second
  • How is force calculated in relation to momentum change?
    Force equals change in momentum divided by time
  • If the change in momentum is 6 and the time is 0.5 seconds, what is the force applied?
    12 newtons
  • What does mv represent in the momentum equation?
    Final momentum
  • What does mu represent in the momentum equation?
    Initial momentum
  • How do you calculate the force required to accelerate a 600-gram ball from rest to 14 meters per second in 0.1 seconds?
    Use the momentum change equation
  • What is the initial velocity of a ball that starts from rest?
    Zero
  • What is the mass of a 600-gram ball in kilograms?
    0.6 kilograms
  • What is the final momentum of a 600-gram ball accelerating to 14 meters per second?
    1. 4 kilogram meters per second
  • What is the force required to accelerate the ball in the previous question?
    84 newtons
  • Why is the change in momentum significant during car crashes?
    It can cause injuries due to high force
  • How can the risk of injury in car crashes be reduced?
    By spreading the change in momentum over time
  • What safety features are required in cars to reduce injury risk during crashes?
    • Crumple zones
    • Seat belts
    • Airbags
  • How do crumple zones help in a car crash?
    • Crumple on impact
    • Increase time to lose momentum
    • Reduce force experienced by occupants
  • What are the functions of seat belts in a car?
    • Prevent ejection from the car
    • Stretch to slow down occupants gradually
  • How do airbags contribute to safety in a car crash?
    • Compressible like a pillow
    • Help slow down occupants gradually
  • What is the key principle behind safety systems like helmets and crash mats?
    • Increase time for momentum loss
    • Result in lower force and reduced harm
  • What is the final takeaway from the video?
    Forces change momentum and affect safety