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April 23, 2014

Homework Help: physic

Posted by Chan on Wednesday, October 21, 2009 at 2:39am.

Hooke's law describes a certain light spring of unstretched length 30.0 cm. When one end is attached to the top of a door frame, and a 8.40-kg object is hung from the other end, the length of the spring is 40.00 cm.
(a) Find its spring constant.
____ kN/m

(b) The load and the spring are taken down. Two people pull in opposite directions on the ends of the spring, each with a force of 190 N. Find the length of the spring in this situation.
___ m

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