GATE Mechanical Engineering (ME) 2016 Shift 2 Solved Paper

In the figure, the load P = 1 N, length L = 1 m, Young’s modulus E = 70 GPa, and the cross-section of the links is a square with dimension 10 mm × 10 mm. All joints are pin joints.

The stress (in Pa) in the link AB is____________.
(Indicate compressive stress by a negative sign and tensile stress by a positive sign.)