56_Physics ProblemsTechnical Physics

56_Physics ProblemsTechnical Physics - Chapter 3 P3.4(a d=...

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Chapter 3 57 P3.4 (a) dx x y y =− + −= + 21 2 2 2 2 2 00 3 00 4 00 3 00 bg ch af .. . . d =+ = 25 0 49 0 8 60 ... m (b) r 1 22 2 00 4 00 20 0 4 47 = = . . a f a f m θ 1 1 400 200 63 4 F H G I K J ° tan . . . r 2 3 00 3 00 18 0 4 24 + = = . . a f a f m 2 135 measured from the + x axis. P3.5 We have 2 00 30 0 r cos r = ° = 30 0 231 . cos . . and yr = ° = sin sin . 30 0 2 31 30 0 1 15 . . P3.6 We have rx y and = F H G I K J tan 1 y x . (a) The radius for this new point is −+= += xy x y r 2 2 and its angle is tan F H G I K J 1 180 y x . (b) () −+ 2 r . This point is in the third quadrant if , is in the first quadrant or in the fourth quadrant if is in the second quadrant. It is at an angle of
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