PhysicsLab2

Physics 114 5/08/19 Carson R., Karl H., Sierra S., Nona W., Howard W. Formal Lab: Vertical Launch Speed Introduction: In this lab we used two different methods to calculate the vertical launch speed of a ball, first by measuring the maximum height the ball reached, and then by measuring the total hang time of the ball. Afterwards, we compared the two different values of our vertical launch speeds, and we also compared our launch speed values with those of another group’s. For this lab we define vertical launch speed as the speed of the ball right after being shot out of the launch device. Procedure: To start, We put the projectile launcher on the ground and pushed the ball into the barrel using the plumber and stopped at where the medium range is written on the barrel. We checked the position of the ball from indicator tape and the hole in the left side of the barrel. We then adjusted the launcher to be vertical with the nut freely hanging and the line connecting to the protractor at 90 degrees. We started the stopwatch when pulled the trigger and stop with the sound of the ball hitting ground. We then Reloaded the Launcher and fired the ball to repeat this measurement for a total of 10 trials. For experiment 2, we held a ruler of a minimum scale of 0.1 cm and a total length of 2 meters upright and against the edge of the Launcher base. We recorded the highest position through ruler and estimated the maximum height by using our records subtract the distance between ground

and launch point which is marked on the side of the launcher. We then Reloaded the Launcher and fired the ball to repeat this measurement for a total of 10 trials. Theory: See paper attached. Data: Data Table for Total Hang Time: Trial # Time (s) Deviation from Mean 1 0.91 0.095 2 0.76 0.055 3 0.76 0.055 4 0.75 0.065 5 0.96 0.145 6 0.91 0.095 7 0.70 0.115 8 0.79 0.025 9 0.84 0.025 10 0.77 0.045 Mean 0.815 0.072 After rounding to one significant figure in the uncertainty, the average total hang time is 0.82s ± 0.07s Data Table for Maximum Height: Trial # Height (m) Deviation from Mean 1 1.468 0.0331 2 1.503 0.0019 3 1.505 0.0039 4 1.508 0.0069 5 1.498 0.0031 6 1.504 0.0029 7 1.506 0.0049 8 1.507 0.0059 9 1.508 0.0069 10 1.504 0.0029 Mean 1.5011 0.00724