Posted by **Tim** on Friday, May 2, 2014 at 9:39am.

A spring has a natural length of 10in. An 800lb force stretches the spring to 14in.

A. Find the force constant

B. How much work is done in stretching the spring from 10 to 12 inches?

C. How far beyond its natural length will a 1600lb force stretch the spring.

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