POE 2.1.2 Intro to Structural Member Properties

What does the Moment of Inertia describe?

• An objects stiffness related to its shape

• An objects stiffness related to its chemical properties

• An objects rotation because of inertia

• An objects rotation because of force

What does the Modulus of Elasticity describe?

• An objects stiffness based on its shape

• An objects stiffness based on its chemical properties

• An objects rotation because of inertia

• An objects rotation because of force

What units is Moment of Inertia measured in?

• in⁴

• psi

• in²

• lbf

What units is Modulus of Elasticity measured in?

• in⁴

• in²

• psi

• lbf

Which measurement impacts an objects Moment of Inertia more heavily?

• Base

• Height

• Width

• Depth

Why does a beam's orientation change it's Moment of Inertia? (Choose the BEST option)

• You are changing what the measured Height is, which heavily impacts Inertia Calculations

• You are changing the measured Base, which heavily impacts Inertia Calculations

• You are changing the beam's length, which heavily impacts Inertia Calculations

• Beam orientation doesn't matter, the Moment of Inertia stays the same.

Describe the relationship between the maximum beam deflection and the modulus of elasticity. Are the two directly related? Inversely related? Not related?

• Directly related: as maximum deflection increases, so does modulus of elasticity.

• Inversely related: as maximum deflection increases, modulus of elasticity decreases and vice versa.

• The two are not related at all

Describe the relationship between the maximum beam deflection and the moment of inertia. Are the two directly related? Inversely related? Not related?

• Directly related: as maximum deflection increases, so does moment of inertia.

• Inversely related: as maximum deflection increases, moment of inertia decreases and vice versa.

• Not Related

Describe the relationship between the maximum beam deflection and the length of the beam. Are the two directly related? Inversely related? Not related?

• Directly Related: As the length of the beam increases, so does the maximum beam deflection.

• Inversely Related: As the length of the beam increases, the maximum beam deflection decreases, and vice versa.

• Not related

Describe the relationship between the maximum beam deflection and the magnitude of the applied concentrated load. Are the two directly related? Inversely related? Not related?

• Directly Related: As the magnitude of the load increases, so does the maximum beam deflection

• Inversely Related: As the magnitude of the load increases, the maximum beam deflection decreases, and vice versa.

• Not Related