1. The problem statement, all variables and given/known data A 50g mass hangs at the end of a hookean spring. When a 20g more is added to the spring, it stretches 7.0cm more. Find the spring constant. 3. The attempt at a solution Isn't it just mg = kx mg/x = k Shouldn't m = 70g instead of 20g??? My key says m = 20g?