Lab 1 Key - Name: Joe Martin and Katie Herman PHS 381L -...

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Name: Joe Martin and Katie Herman PHS 381L - Biomechanics FORCES/VECTOR ADDITION Learning objectives: To increase understanding of vectors. This includes 1)how to convert rectangular coordinates (x,y) to polar coordinates (resultant magnitude and angle) 2) how to add vectors that are not all vertical and horizontal, 3) to increase understanding of the effects of muscle fiber angles in penniform muscles and 4) to understand vector resolution of forces and vector composition of forces. Equipment: calculator To get full credit on each of the questions you must - Show (explain) all of the steps you perform - and you must show your calculations. - Explanation must be complete. - Additionally you must ‘draw’ the vectors you are adding as well as the ones you calculate as your answer. For example if I need to convert (100N, 100N) into polar coordinates my calculations and answer would look like this: A 2 +B 2 =C 2 100 2 + 100 2 = C 2 C = 141.4 N Answer: 141.4N at 45 degrees Θ=Tan -1 opp/adj Θ=Tan -1 100/100 Θ=45˚ I did this example on Microsoft word in just a few minutes. You can ‘Insert symbols’ to add Θ and ˚, and you can use superscript (format-font, if you use Microsoft word) to make numbers squared like Tan -1 and A 2 +B 2 =C 2 . If you’d just rather copy those from here and past them into your solutions below feel free. Draw the arrows like the ones above to show me which direction your vectors are directed.
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PHS 381 – Biodynamics Lab Name _______________________________________________ Introduction/Procedure: When converting polar and rectangular coordinates remember that with rectangular coordinates (x,y) positive numbers are directed up or to the right and negative numbers down or to the left. This holds true for all vertical and horizontal vectors but not vectors that are not vertical or horizontal. Vectors that are not either horizontal or vertical are given a positive magnitude and also a direction. The direction is typically reported as an angle from horizontal, for
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Lab 1 Key - Name: Joe Martin and Katie Herman PHS 381L -...

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