A mass of 0.079 kg hangs from a vertical spring in the lab room. You pull down on the mass and throw it vertically downward. The speed of the mass just after leaving your hand is 5.40 m/s. Part 1 Your answer is correct. (a) While the mass moves downward a distance of 0.05 m, how much work was done on the mass by the Earth? Include the appropriate sign. Work done by Earth = 0.0387 J Part 2 Attempts: 3 of 4 used (b) At the instant in part (a) when the mass has moved downward a distance of 0.05 m, the speed of the mass has decreased to 2.21 m/s. How much work was done on the mass by the spring? Include the appropriate sign. Work done by spring = i eTextbook and Media