1. The problem statement, all variables and given/known data Suppose that I hang a 100 gram mass from a spring. When I do this, I find that the srping stretches 10 centimeters. 1)What is the gravitational force on the mass that I hang from the spring? give your answer in newtons 2)what is the force that the spring is exerting on the mass? 2. Relevant equations F=-ky F=mg 3. The attempt at a solution ok so I figured most of the problem out, I know that its a simple problem but im just stuck on the first part and dont really know how to begin the second question. What I did was use the two equations i gave to solve for g=-ky/m but my problem is i dont know what k is or how to get it. As for the second part, i just have no idea how to start it. Thanks for any help in advance.