Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 9 - Static Equilibrium; Elasticity and Fracture - Problems - Page 253: 13

Answer

The tension in the left cord is 260N and the tension in the left cord is 190N

Work Step by Step

Let $F_1$ be the tension in the right cord and $F_2$ be the tension in the left cord. We will sum the forces in each direction to solve for the tensions. So; $(\rightarrow +) \sum \overrightarrow{F}_{x} =0 $ $cos(37^{\circ})F_1-cos(53^{\circ})F_2=0$ $F_1=\frac{cos(53^{\circ})F_2}{cos(37^{\circ})}$ $(\uparrow +) \sum \overrightarrow{F}_{y} =0 $ $F_2sin53^{\circ}+F_1sin37^{\circ}-33kg*9.8m/s^2=0$ Now substitute in equation 1 $F_2sin53^{\circ}+(\frac{cos(53^{\circ})F_2}{cos(37^{\circ})})sin37^{\circ}-33kg*9.8m/s^2=0$ $F_2=(33kg*9.8m/s^2)/(sin53^{\circ}+(\frac{cos(53^{\circ})}{cos(37^{\circ})})sin37^{\circ})$ $F_2\approx260N$ $F_1=\frac{cos(53^{\circ})F_2}{cos(37^{\circ})}$ $F_1=\frac{cos(53^{\circ})260N}{cos(37^{\circ})}$ $F_1\approx190N$
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