Ahiker, who weighs 985 n, is strolling through the woods and crosses a small horizontal bridge. the bridge is uniform, weighs 3610 n, and rests on two concrete supports, one at each end. he stops one-fifth of the way along the bridge. what is the magnitude of the force that a concrete support exerts on the bridge (a) at the near end and (b) at the far end?

Asolid round steel rod 6.25 mm in diameter and 375 mm long is rigidly bonded to the end of solid square brass rod 25 mm on a side and 300 mm long. the geometric axes of the bare are along the same line. an axial tensile force of 5.4 kn is applied at the extreme ends of the assembly. for steel e = 200 gpa and for brass e = 90 gpa. determine the total elongation for the assembly.