In checking a recently installed fencepost for adequacy of the ground support, a person exerts a force P= -160i +40j +60k N on top of the post. Determine the angles which P makes with the positive x-axis and with the x-z plane.

International Edition---engineering Mechanics: Statics, 4th Edition
4th Edition
ISBN:9781305501607
Author:Andrew Pytel And Jaan Kiusalaas
Publisher:Andrew Pytel And Jaan Kiusalaas
Chapter4: Coplanar Equilibrium Analysis
Section: Chapter Questions
Problem 4.153P: Repeat Prob. 4.152 assuming that the 400-kN force is applied at O instead of L.
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In checking a recently installed fencepost for adequacy of the ground support, a person exerts a force P= -160i +40j +60k N on top of the post. Determine the angles which P makes with the positive x-axis and with the x-z plane. 

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