1. The problem statement, all variables and given/known data A mass of 0.103 kg hangs from a spring. you pull the mass down and has a speed 3.60 m/s. The mass moves down .10 m. What was the work done by the earth? When the mass moved downward, it slowed down to 2.66 m/s. What was the work done by the spring. 2. Relevant equations Work done by earth = m*g*d Work done by spring = 1/2 m*[tex]\Delta[/tex]v2? 3. The attempt at a solution I got the work done by the earth to be 0.10094 J. I can't seem to get the work done by the spring. Is that the right formula? Am i suppose to take the rest energy of the spring and add that to the work done by the Earth?