Question

Knowing that Pis 24 kN, applied to both sides of the bar at Band Q is 45 kN, applied to the bar at Cas shown. What is the internal normal force acting on a vertical cross-section passing through the bar between points A and B? Express your answer in Newtons (not kN), to the nearest whole Newton, taking tension as positive and compression as negative. B4 - 400 mm — -600 mm

Answer 1

45 kN 38.4 kN 400 mm 600 mm

As shown in figure, forces acting at B are resolved components of P along the direction of bar and the force Q.

Net internal force acting on a vertical cross section between points A and B = 2$\times$24$\times$(4/5) - 45 = - 6.6 kN = - 6600N