Question

Problem 3 Determine the vertical and horizontal components of force at pin A and the reaction at the fixed support D. 1kN 1.5m 1.5m A B 4m с 4m D

Answer 1

ВА Free body diagram or $1.slash Ax Ау Fize tan' (1) 53:130 Oo te EmA =0 FBC sino (1.571.5) -1(1-5) =0 1.5 FBC I sin(83.13) (3) FBC a 0.625 kW Efx=0 (-) FBC Logo it Ax=0 Ax s.- [0.625 60($313)] Ax=-0.375 kN) () Efyzo Foc sino tays Ay a 1 - (0.625 sin(53:13) Ay = 0.5 KN FBD of ACD Ay Ax am FBC Homes — D MOA 1 Dy

Efy=0 Ay - Oy + Fibe sino = 0 Dy = 0.5 +60.625 sin(53-13) Dy = I KN) Efx=0 Da -o Axtfic los o Los (53.13) Dr=-0.375+ 0.625 $5343 Dя 2 O