Denote the initial speed of a cannon ball fired from a battleship as v0.the time of flight tmax of the cannonball for this maximum range r is given by when the initial projectile angle is 45◦ with respect to the horizontal, it gives a maximum range r.

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.