3. Draw a FBD for a mass that is hanging on a spring that is in equilibrium. 4. Imagine that you take the mass hanging from a spring system from question 3 on a trip to four different planets. The acceleration of gravity on the surface of each planet is: aplanet 1 = 0.17 g (Moon) aplanet 2 = g (Earth) aplanet 3 = 2.4g (Jupiter) aplanet 4 = 0 Rank the stretch of the spring on each planet (from shortest to longest). Explain your reasoning. (Use Intro to test this.) Predictions Observations