For a system of particles, the moment of inertia is calculated as the sum of the

Practice Questions

Q1
For a system of particles, the moment of inertia is calculated as the sum of the products of mass and the square of the distance from the axis of rotation. This is known as:
  1. Parallel Axis Theorem
  2. Perpendicular Axis Theorem
  3. Rotational Dynamics
  4. Angular Momentum

Questions & Step-by-Step Solutions

For a system of particles, the moment of inertia is calculated as the sum of the products of mass and the square of the distance from the axis of rotation. This is known as:
  • Step 1: Understand that the moment of inertia is a measure of how difficult it is to change the rotation of an object.
  • Step 2: Recognize that for a system of particles, we need to consider each particle's mass and its distance from the axis of rotation.
  • Step 3: The formula for calculating the moment of inertia (I) is I = Σ(m_i * r_i^2), where m_i is the mass of each particle and r_i is the distance from the axis of rotation.
  • Step 4: The term 'Σ' means you add up all the values for each particle in the system.
  • Step 5: This method of calculating moment of inertia is known as the Parallel Axis Theorem.
  • Moment of Inertia – A measure of an object's resistance to changes in its rotation, calculated as the sum of the products of mass and the square of the distance from the axis of rotation.
  • Parallel Axis Theorem – A theorem that allows the calculation of the moment of inertia of a body about any axis parallel to an axis through its center of mass.
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