5.4 Angular Momentum

Cards (25)

  • What is angular momentum a measure of?
    Resistance to rotational motion
  • The formula for angular momentum is L = Iω
  • Angular momentum is a scalar quantity.
    False
  • Steps to determine the direction of angular momentum using the right-hand rule
    1️⃣ Point your thumb in the direction of rotation
    2️⃣ Your fingers curl in the direction of the angular momentum vector
  • Under what condition is angular momentum conserved in a closed system?
    No external torques applied
  • The unit for angular momentum is kg·m²/s
  • What is the angular momentum of an object with a moment of inertia of 0.05 kg·m² and an angular velocity of 20 rad/s?
    1 kg·m²/s
  • What does the moment of inertia measure?
    Resistance to rotational changes
  • In a closed system, angular momentum remains constant unless external torques are applied.
    True
  • Angular momentum is a scalar quantity.
    False
  • In a closed system, angular momentum is conserved
  • What two factors does angular momentum depend on?
    Moment of inertia and angular velocity
  • The unit for angular momentum is kg·m²/s.

    True
  • How does increasing the moment of inertia affect angular momentum?
    It increases angular momentum
  • The Law of Conservation of Angular Momentum states that in a closed system, angular momentum remains constant over time.

    True
  • What happens to a spinning figure skater's moment of inertia when they pull their arms inward?
    It decreases
  • Match the variable with its definition:
    L ↔️ Angular Momentum
    I ↔️ Moment of Inertia
    ω ↔️ Angular Velocity
  • What is the effect of increasing the moment of inertia on angular momentum if angular velocity remains constant?
    Increases angular momentum
  • Increasing the angular velocity of an object while keeping its moment of inertia constant will increase its angular momentum.
  • The formula for angular momentum is L
  • Steps to determine the direction of angular momentum using the right-hand rule:
    1️⃣ Point your thumb in the direction of rotation
    2️⃣ Your fingers curl in the direction of the angular momentum vector
  • The direction of angular momentum is determined using the right-hand
  • What is the moment of inertia a measure of?
    Resistance to rotational changes
  • A disk with a moment of inertia of 0.05 kg·m² rotating at 20 rad/s has an angular momentum of 1 kg·m²/s
  • Increasing angular velocity will increase the angular momentum