-@ GSP! ?N j l"l $۲۲l4l۲  A '.)  ? ?v@è} //78bGHuTo swing the pendulum, double-click the Swing! button. Drag point x to change the length of the pendulum or point bob to change the radius of the bob. Try measuring (using a stopwatch) the pendulums period to determine the relationship between its length and period. Is this relationship the same as in the physical world? You can change the amplitude of the swing by dragging the horizontal line up or down. Does the period depend on amplitude? Bill Finzer, Key Curriculum Press, 1993>UO1 n U? ?v@èCKC(!&H T? ?v@èB C(AF driver centerèCCy ~! fulcrumcenterèCAx}6 HulcrumcenterèBCL38x GulcrumcenterèBTCL'H horizoncenterèB C(CKC(@mn #'H qorizoncenterèBTCLBCL?5: