7. Assuming that all of the work done on the bowstring is stored in the bent bow, determine the amount of energy stored in the bow at full extension (0.5 m). Call this energy, Emma (Generalize what you did in question 6 above for more than 3 & 4 data points.) CHECK WITH AN INSTRUCTOR AT THIS POIN T 8. You want to estimate the release speed of an arrow (which you have measured to have a mass of M = 0.02 kg) launched horizontally. You estimate that about 80% of the energy in the bow goes to kinetic energy Kof the arrow. What is the speed of the arrow as it leaves the bow? First put your answer in terms of Emw-f and M, then solve for the numerical value. What might have happened to the other 20%: of Emma)