A cylindrical body of length body of length Stephanie @The Saylor

Question 24 / 40: A cylindrical body of length body of length 5 cm and diameter 1 cm is subject to a tension force of 1000 N. The cylinder extends by 3 mm in length. If the body behaves elastically, which of the following represents Youngs modulus for that material?

A 212 MPa

B 848 MPa

C 848 kPa

D 212 KPa

E 424 kPa

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Explanation:

First calculate the force per cross sectional area by dividing 1000 N by the area of the cylinder; this is the stress. The calculate the strain from 0.3 cm/5 cm = 0.06. Young's modulus can be found by dividing the stress by the strain. Be careful with units. You may wish to review section 2.2.

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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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