Posted by **William** on Wednesday, December 19, 2012 at 7:31pm.

An exercise spring has a spring constant of 315 N/m. How much work is required to stretch the spring 30 cm? What force is needed to stretch the spring 30 cm?

- Physical Science -
**drwls**, Wednesday, December 19, 2012 at 7:45pm
Use meters for the displacement, X.

Force = k*X = 315*0.3 = 94.5 N

Work = (1/2)*k*X^2 = (1/2)(315)(.3)^2

= 14.2 J

- Physical Science -
**dharmendra**, Tuesday, December 25, 2012 at 9:23am
what is fuming nitric acid?

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