Questions:1. Considering the graphical and analytical methods for obtaining the resultant, which method is more accurate? Give the probable sources of error for each method.

2. Vector (A-B) is a special case of vector addition since A-B = A + (-B). Suppose that the cases of vector addition I, II, III in this experiment were vector subtraction (F1-F2).(a) What effect would this have on the directions of the resultants? (Do not calculate explicitly. Simply state in which quadrant the resultant would be in each case.)

(b) Would the magnitude of the resultant be different for vector subtraction than for vector addition in each case? If so, state whether the subtractive resultant would be greater or less than the additive resultant.

3. A picture hangs on a nail as shown in Fig 6.7. The tension T in each string segmentis 3.5N.(a) What is the equilibrant or the upward reaction force of the nail?

(b) What is the weight of the picture?

W=-7N 3.5sin45+3.5sin45-W=0 2(3.5N) sin45=4.9N