72_Physics ProblemsTechnical Physics

# 72_Physics ProblemsTechnical Physics - Chapter 3 P3.58...

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Chapter 3 73 P3.58 Choose the + x -axis in the direction of the first force. The total force, in newtons, is then 120 310 840 240 360 700 . ± . ± . ± . ± . ± . ± ijij i j +−−= + ej N. The magnitude of the total force is 787 22 .. . () + ()= N N and the angle it makes with our + x -axis is given by tan . . θ = , 62 8 . . Thus, its angle counterclockwise from the horizontal is 35 0 62 8 97 8 . °+ °= ° . R 35.0° y 24 N horizontal 31 N 8.4 N 12 N x FIG. P3.58 P3.59 di dj j i j j i j Rd d d d i j R 1 2 3 4 1234 1 100 300 150 30 0 150 30 0 130 75 0 200 60 0 200 60 0 100 173 130 202 130 202 240 202 130 57 2 180 237 = =− ° − ° =− ° + + =+++=− − + = = F H G I K J =+ = ° ± ± cos . ± sin . ±± . ± cos . ± sin . ± tan . af a f a f m m φ θφ FIG. P3.59 P3.60 d dt dt dt r ij j jj
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## This note was uploaded on 12/14/2011 for the course PHY 203 taught by Professor Staff during the Fall '11 term at Indiana State University .

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