Problem 425
In the Fink truss shown in Fig. P-425, the web members BC and EF are perpendicular to the inclined members at their midpoints. Use the method of sections to determine the force in members DF, DE, and CE.
Problem 424
For the truss shown in Fig. P-424, determine the force in BF by the method of joints and then check this result using the method of sections. Hint: To apply the method of sections, first obtain the value of BE by inspection.
Problem 423
Use the method of sections to determine the force acting in members DF, EF, and EG of the Howe truss described in Problem 409.
Find each member. (method of sections)
Find each member and reactions. (by joint method)
You deposit \$1,000 into a 9% account today. At the end of two years, you will deposit another \$3,000. In five years, you plan a \$4,000 purchase. How much is left in the account one year after the purchase?
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Find the center, vertices, foci of the ellipse given the equation 16x² +25y² -160x - 200y + 400 = 0.
Please help...
tdx/dx = 6t(e^ 2t) +x(2t-1)
dx-(1+2xtany)dy=0
Please help me to solve that
