(5) 1. What one major source of error did you encounter? How did it affect your results? How did you attempt to minimize their effect? To improve your results, what would you do differently next time? (3) 2. To obtain the best accuracy, the tension force acting on the stopper should be horizontal. What should happen to the accuracy as the frequency of revolution of the stopper(s) increases? Explain your reasoning. 3. Use the equation 4n mof to answer the following questions. (3} (a) Determine the relationship between F, and (i) m, (ii) r, and (iii) f. Express your answer as a proportionality. (3} (b) What happens to F, when (i) m, (ii) r, and (iii) fare halved? Express your answer as a multiplier. (4} (c) How can you keep F and r constant if m quadruples? if f triples? Explain your reasoning with the aid of a proportionality statement. (3} 4. A conical pendulum swings in a circle, as shown. Show that the form of the equation relating the angle that the string makes with the vertical to the speed of the bob is identical to the equation for the banking of curves. (i.e. tan0 = v*/rg) L length of pendulum h angle with vertical FT tension in the string mg weight of bob (i.e. F.) radius of circular path r h height of object from ceiling