A Beam Has a Rectangular Cross-Section 40 Mm Deep, with Second

question 5

Multiple Choice

A beam has a rectangular cross-section 40 mm deep, with second moment of area about the neutral axis of 7 % 104 mm4, and is bent into the arc of a circle. For a bending moment of 120 N m, the maximum bending
Stress is:

• A) 17.2 MPa
• B) 34.3 MPa
• C) 68.6 MPa
• D) 1714 MPa

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Definitions:

Incremental Cost

The additional cost that arises from producing one more unit of a good or service.

Cash Flows

The inflows and outflows of cash and cash equivalents, representing the operational, investing, and financing activities of a business.

Post-audit

The evaluation process conducted after a project's completion to assess its actual performance against planned objectives and costs.

Accounting Rate of Return

A financial metric that measures the return on investment expected from a project or asset, calculated as the average annual profit divided by the initial investment cost.