While standing at the edge of the roof of a building, a man throws a stone upward with an initial speed of 6.21 m/s. The stone subsequently falls to the ground, which is 16.9 m below the point where the stone leaves his hand. At what speed does the stone impact the ground? Ignore air resistance and use g = 9.81 mfs2 for the acceleration due to gravity. impact speed: 1803 m/s Incorrect How much time is the stone in the air? 2.47 elapsed time: s Incorrect ' Vector A has components Ax = 4.84 and Ay = 18.1. What is the magnitude A of this vector? A = 18.74 Determine the angle 9 in degrees between the calculated vector and the +x-axis, measured counterclockwise from the 750 +x-axis. 6 = Incorrect p Pool players often pride themselves on their ability to impart a large speed to a pool ball. In the sport of billiards, event : organizers often remove one of the rails on a pool table to allow players to measure the speed of their break shots (the opening ! shot of a game in which the player strikes a ball with his pool cue). With the rail removed, a ball can y off the table, as shown 5 in the gure. v0 The surface of the pool table is h = 0.750 m from the oor. The winner of the competition wants to know if he has broken the world speed record for the break shot of 32 mph (about 14.3 m/s). If the winner's ball landed a distance of d = 4.25 m from the table's edge, calculate the speed of his break shot v0. Assume friction is negligible. 00 = 10787 m/S At what speed [)1 did his pool ball hit the ground? A rugby player passes the ball 7.25 m across the eld, where it is caught at the same height as it left his hand. At what angle was a the ball thrown if its initial speed was 12.0 m/s, assuming that the smaller of the two possible angles was used? What other angle gives the same range? For the pass using the smaller of the two angles, how long is the ball in the air? Question Credit: OpenStax College Physics