Homework Help: physics

Posted by leena on Monday, March 31, 2008 at 5:41pm.

An elastic cord is 65 cm long when a weight of 75 N hangs from it but is 85 cm long when a weight of 189 N hangs from it. What is the “spring” constant k of this cord

physics - bobpursley, Monday, March 31, 2008 at 5:52pm
k=changeinForce/change in length.

k=(189-75)/(85-65) N/cm

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