Alternate Expressions of Force Direction | Mathcad 15 Introduction

LECTURE 02b
Here a derivation is shown that uses similar triangles to find force components directly without first finding an angle. Also, the direct use of the definitions of the trig functions (SOH-CAH-TOA) to handle cases where force direction angles are given relative to axes other than horizontal axes. An example is completed in Mathcad 15 where the resultant is found of two forces for which the directions are given in these alternate forms. The power of Mathcad to handle variations of a problem is demonstrated via plugging a second similar problem into the sheet. Another form of the inverse tangent function built into Mathcad (called atan2()) is shown to be useful in cases where engineers want Mathcad to automatically determine the quadrant in which a resultant lies.

ENGR 122 Playlist (Engineering Problem Solving III):

ENGR 121 Playlist (Engineering Problem Solving II):

ENGR 120 Playlist (Engineering Problem Solving I):

This lecture segment was recorded on March 12, 2018. All retainable rights are claimed by Michael Swanbom.

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