Well i remember doing this in physics class like 4 years ago, and it slipped my mind. I basically am doing a project of taking like 20+ springs and comparing there spring constants. Am all of this will be in a lab. And if i remember correctly k=(newtons)/ meter i know this is probably wrong, but i can get my hands on a digital force gauge and any building materials. can someone please point me in the right direction. BTW i am planing on getting my doctorate in the physics field i just love it.