A stone is thrown horizontally at a speed of 10.0 m/s from the top of a cliff 139.4 m high. a) How long does it take the stone to reach the bottom of the cliff?
b) How far from the base of the cliff does the stone strike the ground?
c) What is the vertical velocity of the stone when it strikes the ground?

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.