A spring with an un-stretched length of 5 in expands from a length of 2 in to a length of 4 in. The work done on the spring is . . in .lb. (A) - k (2 in)? (B) k [(4 in)? - (2 in)²] (C) -k [(4 in)? - (2 in)²] 1 (2 in2 (1 in 21

A spring with an un-stretched length of 5 in expands from a length of 2 in to a length of 4 in. The work done on the spring is . . in .lb. (A) - k (2 in)? (B) k [(4 in)? - (2 in)²] (C) -k [(4 in)? - (2 in)²] 1 (2 in2 (1 in 21

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Processing of Polymer Matrix Composites

The polymer matrix composite is described as a composite material that contains some polymer in the form of either fibers or powder. Polymer matrix composites are also known in short as PMC's.

Question

A spring with an un-stretched length of 5 in expands from a length of 2 in to a length
of 4 in. The work done on the spring is . in .lb.
(A)
k (2 in)2
(B) k [(4 in)? - (2 in)2]
(C) - k [(4 in)? - (2 in)?]
(D) k [(3 in)? - (1 in)*]

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