Centroidal Ix of a Rectangular Section
Easymoment of inertiarectangle
A rectangle is 0.30 m wide and 0.60 m tall. Its centroidal moment of inertia about the horizontal axis, Ix, is:
- A0.0054 m⁴
- B0.0018 m⁴
- C0.0108 m⁴
- D0.0324 m⁴
Show solutionHide solution
Answer: A. 0.0054 m⁴
Ix = bh³/12 = 0.30 × 0.60³/12 = 0.0054 m⁴. Swapping b and h gives 0.0018 m⁴, and using bh³/3 (about the base) gives 0.0216 m⁴.
Practice this deckUntimed, one problem at a time, with your progress saved.
Related problems
- Moment of Inertia of a Rectangle · Section Properties
- Centroid Height of a Rectangle · Section Properties
- Moment of Inertia of an I-Section · Section Properties