- Data Table 63 07g Ball Mass M First Is Weigh Scale Pendulum Arm Effective Mass Initial Height Of Center Of Mass Trial 1 1 (13.98 KiB) Viewed 45 times
Average final height hf= Change in height h = 5.94 Final Energy Ef=__0.104_ Velocity of pendulum and ball combined Initial velocity of ball v0 = 3.06 12.74 0.049 _(__cm______ = 0.049 _(__cm___)__ (J_____)_ 1.08 VA = (m/s _(_____m/s__)__
2) Explain how you could determine the center of mass of the pendulum arm if it weren't marked for you. 3) Why do you use an "effective mass" instead of the actual mass of the pendulum arm? 4) Is momentum conserved from the very start of the experiment (ball just launched) to the very end (pendulum arm at its highest)? Why or why not?
5) Is the collision between the ball and pendulum elastic or inelastic? In other words, is energy conserved during the collision between the ball and the pendulum? Use your data and additional calculations to back up your claim. 6) Calculate the kinetic energy lost during the collision as a percent difference. 7) Where does the "lost" energy go? Lost Energy goes into friction as heat energy 8) Use algebra to prove that the initial velocity of the ball leaving the pendulum is given by the following formula.
9) Using the idea of impulse and estimating the size of an eye, if the metal ball hit someone in the eye and came to a stop, make an estimate of how much force would be applied to the eye.