26 Electric FieldsP23.68The bowl exerts a normal force on each bead, directed along theradius line or at 60.0° above the horizontal. Consider the free-bodydiagram of the bead on the left:Fnmgy=°−=∑sin.60 00 ,ornmg=°sin.60 0.Also,FFnxe∑=− +°=cos.60 00 ,orkqRnmgmge2260 060 03=°=cos.tan..Thus,qRmgke=FHGIKJ312.nmg60.0°FeFIG. P23.68P23.69(a)There are 7 terms which contribute:3 are saway (along sides)3 are 2saway (face diagonals) and sincosθθ==121 is 3saway (body diagonal) and sinφ=13.The component in each direction is the same by symmetry.Fijkijk=++LNMOQP
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