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Rigid Body Dynamics: Perpendicular Axis Theorem MCQ

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Perpendicular Axis TheoremEasyQuestion 30309

Question

The perpendicular axis theorem (for a flat lamina) states: I_z = ___
  1. A
    I_x × I_y
  2. B
    I_x + I_y
    Correct
  3. C
    I_x − I_y
  4. D
    I_x / I_y

Correct answer

I_x + I_y

Explanation

For a flat lamina, the moment of inertia about the axis perpendicular to the plane equals the sum of moments of inertia about two perpendicular axes in the plane: I_z = I_x + I_y.

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