Question

Figure 3 shows a 6 times 4 ft sheet of plywood that is propped against a vertical pole at C and supported on small wooden blocks at A and B. Contact at all points is frictionless and the sheet is prevented from slipping at A, B by vertical nails. If the sheet weighs 40 lb and the angle alpha = 45 degree, find the reactions at all the supports. all dimensions in feet.

Answer 1

Jven size d plhod sheed is 6 Ku fed weight shee is ao lb 4 RA-RB =-40 RA+RB = 56.563-. Fso the figue we ges from dicず.on) 5 hec we 쨘 Cee erd-%xty on pla.rwood RA-RBュ56.568 2- RA =RB 28.284从0 Re = 56.666,UO