What is the moment of inertia for a solid cylinder about its central axis?

Practice Questions

Q1
What is the moment of inertia for a solid cylinder about its central axis?
  1. 1/2 m r^2
  2. m r^2
  3. 1/3 m r^2
  4. m r

Questions & Step-by-Step Solutions

What is the moment of inertia for a solid cylinder about its central axis?
  • Step 1: Understand what moment of inertia means. It is a measure of how difficult it is to change the rotation of an object.
  • Step 2: Identify the shape we are dealing with. In this case, it is a solid cylinder.
  • Step 3: Recognize that the moment of inertia depends on the mass and the distribution of that mass relative to the axis of rotation.
  • Step 4: For a solid cylinder, the formula for the moment of inertia about its central axis is I = 1/2 m r^2.
  • Step 5: In the formula, 'm' represents the mass of the cylinder, and 'r' represents the radius of the cylinder.
  • Step 6: To use the formula, you need to know the mass and radius of the cylinder.
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