1. The problem statement, all variables and given/known data A man that has a mass of 100kg stands on a platform 10m high. Right next to the platform is a spring of the same height. When the man steps off the platform and steps onto the spring, the spring compresses to 3m in height. What is the work done on the spring? What is the spring constant? 2. Relevant equations w=(1/2)Fd F=ma w=(1/2)kD2 3. The attempt at a solution w=(1/2)(100kgx10m/s/s)(10m-3m)=3500J 3500J=(1/2)k(7m)2 k=142.9 N/m Am I using the correct equations and if so, am I getting the right answer?