One end of a 2 m long steel rod (d = 3 cm) is rigidly attached to a wall so that the rod is perpendicular to the wall. the other end of the rod is welded to a second rod, which is 1 m long (d = 1.0 cm). the second rod is parallel to the wall and the floor. a vertical force of 50 n is applied to the end of the second rod. for both rods, the modulus of elasticity is 210 × 109 pa and the shear modulus is 79 × 109 pa.