Which of the following statements best Stephanie Redfern Saylor Mechanics

Question 25 / 40: Which of the following statements best describes the difference between normal and shear stresses?

I. Normal stresses are more common than shear stresses.

II. Normal stresses may result in elongation or compression.

III. Shear stresses may cause a change in shape or sliding motions.

IV. Normal and shear stresses may have different units.

A Both I and IV

B Both II and IV

C III only

D Both II and III

E I only

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Explanation:

Normal stresses are orthogonal to planes of action and may result in those planes moving together or apart; shear stresses act in planes of action and slide those planes relative to one another. You may wish to refer to the reading for sub-subunit 2.3.3.

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Mechanics I ME102

Author:

Stephanie Redfern

The Saylor Foundation

USA

Access: Public Instant Grading

Attribution: Stephanie Redfern, Ranjeet (Ron) Agarwala, and Dr. Steve Gibbs. Mechanics I. The Saylor Academy 2014, http://www.saylor.org/courses/me102/

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