Procedure 3 - Rocket Launch, determining launch velocity. In this experiment you will launch a rocket vertically, straight up, and measure the time of flight. We can use either the time to reach the peak of flight or the total time of flight. Measuring the total time of flight is recommended as a longer time is less affected by reaction times in operating the stop watch. The time to reach the peak is 1/2 the total time of flight. Let t = time to reach peak V = 0 at the peak V= V - gt 0 = V - 9.8 t V = 9.8 t Perform 10 trials, measure the flight time, and calculate the initial velocity. Remember the equation above uses the time to peak of flight, 1/2 the flight time. Data table for rocket experiment - vertical launch Trial Number Flight time (sec) Calculated velocity (m/s) 0.85 s 4.2m/s 0.82 s 4.0 m/s 0.78 s 3.8 m/s 0.87 s 4.3 m/s O NOUAWNH 0.75 s 3.7 m/s 0.87 s 4.3 m/s 0.94 s 4.6 m/s 8 0.81 s 4.0 m/s 0.81 s 4.0 m/s 10 0.81 s 4.0 m/s Average 0.83 s 4.1 m/s Standard Deviation 0.05 s 0.26 m/s