A stunt woman plans to launch herself from a cannon and land in a net. The cannon can launch her at a speed of 16.1 m/s. The net is 25 m away, at the same elevation as the cannon. At what angle (relative to horizontal) should the cannon be aimed so the stunt woman lands safely

Two cannon balls weighing 18 kg and 24 kg are chained together and fired horizontally with a velocity of 165 m/s from the top of a 21-m wall. the chain breaks during the flight of the cannonballs and the 18-kg cannonball strikes the ground at t = 1.5 s, at a distance of 240 m from the foot of the wall, and 7 m to the right of the line of fire. determine the position of the other cannonball at that instant. neglect the resistance of the air.