[填空题]
While fishing, you geb3udn 1+ p /4(iql ezeojd9pb7t boredf pt .ik5i9npip ,i:m o,4p/o2po 3xeu and start to swing a sinker weight around in a circle below you on a 0.25-m piece of fishing line. The weio2 o5ei .u 3: ,,9fiixppi4okppnmp/ tght makes a complete circle every 0.50 s. What is the angle that the fishing line makes with the vertical? [Hint: See Fig. 5–10.] $^{\circ}$
