Question

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

bobpursley
Hookes law is elongation=kx

What part of that are you having difficult with?
jishka sucks there are no answers on this website

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