Posted by GRISSELL on Thursday, February 23, 2012 at 2:54pm.
Consider a spring and block system
k= 18 N/m
x initial = o m
x final = 0.08m
Useing Hooke's law to calculate the force needed to stretch this spring 8 cm.

PHYSICS  Damon, Thursday, February 23, 2012 at 3:10pm
F = k x = 18 * .08
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