Figure 4.2. Screen shot of 'https://phet.colorado.edu/simsfhtml/pendulum-lab/latest/pendulum- lab_en.html' from PhET Interactive Simulations. Procedure Period of the simple pendulum Choose Lab. Choose Length 1 to be 1 m. Choose a Mass 1 to be 1 kg. Choose Earth. Choose Friction - None. Choose Period Timer, Stopwatch, and Ruler. Start the pendulum in motion by pulling the mass 10 from vertical. Record the time in the Period Timer by clicking Play button. This is the time for one complete oscillation T. 8. Take FOUR more trials while keeping the same angle, but shortening the length of pendulum by 0.2 111 each time. Record your results in Table 4.1. 9. Square T values to ll in last column of Table 4.1. HP'P'PP'E"? Table 4.1 L (m) T (sec) ' T2 (sec)2 1 \\