What is the moment of inertia of a uniform rectangular plate of mass M and dimen

Practice Questions

Q1
What is the moment of inertia of a uniform rectangular plate of mass M and dimensions a x b about an axis through its center and parallel to side a?
  1. 1/12 Ma^2
  2. 1/12 Mb^2
  3. 1/3 Ma^2
  4. 1/3 Mb^2

Questions & Step-by-Step Solutions

What is the moment of inertia of a uniform rectangular plate of mass M and dimensions a x b about an axis through its center and parallel to side a?
  • Step 1: Understand what moment of inertia is. It is a measure of how difficult it is to change the rotation of an object.
  • Step 2: Identify the shape of the object. In this case, it is a uniform rectangular plate with mass M and dimensions a (length) and b (width).
  • Step 3: Determine the axis of rotation. The axis is through the center of the plate and parallel to side a.
  • Step 4: Recall the formula for the moment of inertia of a rectangular plate about an axis through its center and parallel to one of its sides.
  • Step 5: For a rectangular plate with mass M and width b, the moment of inertia about the specified axis is given by the formula I = (1/3) * M * b^2.
  • Step 6: Substitute the values into the formula to find the moment of inertia.
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