deletions | additions       diff --git a/EM Calc - SAP.tex b/EM Calc - SAP.tex  index 4c99d38..993e960 100644  --- a/EM Calc - SAP.tex  +++ b/EM Calc - SAP.tex 
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The required force was approximately 3 N.  Some switches, however, required higher forces, and a worst-case estimate of 5 N was used.  The worst-case scenario would be a full tray, with all switches having high-resistance of 5 N.  So the maximum required force is $9 \times 5 N \mathrm{N}  = 45 N$. \mathrm{N}$.