2. What is the difference between scalar and vector quantities? 3. Is it always true that 1 + 2 =3? If not, under what condition 1 + 2 = 3? . Draw on Fig. (a) the vector sum R, = a +b + c+ d +e using polygon method. Draw on Fig. (b) the vector sum R2 = a + b te + c +d using polygon method. Verify R, = R, by showing: (a) R = R : R, is the magnitude (length) of R,, i.e., the distance between P, and P2. R, is the magnitude (length) of R2, i.e., the distance between P3 and P4. (b) R, ll R, : Draw an extension line of R,, then draw two lines perpendicular to the extension line and make the two lines longer enough to reach the line of R2 . Measure the lengths of the two lines to show that R II Rz . a Figure ( a) R , = atb+c+dte Figure ( b ) R = atb te + c + dLab report on Experiment 4 1. Tables 1 to 3 with all the required data must be included in your Exp 4 lab report. 2. The drawing of the vector sum diagram (Procedures 4) must be included in your Exp 4 lab report. 3. The drawing of the component diagram (Procedures 5) must be included in your Exp 4 lab report. 4. It is required that the answers to the following questions should be included in your lab report. 5. The required other contents and format for your lab report can be found in the syllabus. 6. You can tear those pages out of the lab manual as a part of your lab report, which contain measured (raw) data and analyzed data, answers to questions. The data sheets must be checked and signed by your lab TA. Questions Two vectors F, and F, are shown in the figure. (a) Use the "Parallelogram Method" shown in Fig. 2a draw the resultant vector of F, - F . Hint: Vector subtraction ( F, - F2 ) is a special case of vector addition, since F; - F2 = F; + (-F2). F F 2 (b) Use the "Triangle (head to tail) Method" shown in Fig. 2b draw the resultant vector of F, - F2 . F. 39