Homework Help: Moments and resultant

1. Sep 27, 2010

pinksunbeam

1. The problem statement, all variables and given/known data

A chiropractor applies a thrust to the spinous process of T6. The magnitude is 400 N and it is applied 90 degrees to the y-axis. While this occurs the superior disc applies a force to the T6 body of 615 N, 75 degrees to the x-axis. The inferior disc applies a force to the T6 body of 620 N, 70 degrees to the x-axis. Determine the resultant force-couple acting on the T6 vertebra at the point of application F2. The coordinates of the points of application for each force are shown in brackets.

2. Relevant equations

moment= force by perpendicular distance

3. The attempt at a solution

need to get moments first. im dont think i did this right but i moved f1 and f3 to f2 and got moment there.
f1=.063x400= 38.75 N.m
f2=.018x620=9.92N.m

is this right way to get the moment for this question? i believe im doing something wrong with distance

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2. Sep 29, 2010

pinksunbeam

Last edited: Sep 29, 2010