Chapter 359P3.11(a)di=−=10 010 0.±. m since the displacement is in astraight line from point A to point B.(b)The actual distance skated is not equal to the straight-linedisplacement. The distance follows the curved path of thesemi-circle (ACB).sr===1225157ππbg. mC B A 5.00 mdFIG. P3.11(c)If the circle is complete, dbegins and ends at point A. Hence, d=0.P3.12Find the resultant FF12+graphically by placing the tail of F2at the head of F1. The resultant forcevector +is of magnitude 95. N and at an angle of 57°above the -axisx.0123NxyF 2 F 1 F 1 F 2 + FIG. P3.12P3.13(a)The large majority of people are standing or sitting at this hour. Their instantaneous foot-to-head vectors have upward vertical components on the order of 1 m and randomly oriented
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