Pool players often pride themselves on there ability to large speed on a pool ba
ID: 1955299 • Letter: P
Question
Pool players often pride themselves on there ability to large speed on 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 stokes a ball with his pool cue). With the rail removed, a ball can off the table: the distance the pool boa lands from the table indicates the Initial speed of the only participant with a physics background, they have placed you in charge of determining the speed of the players' break shots. The top of the pool label is 3. 05 ft from the floor. The placement of the tape is such that 0 feet aligns to the edge of the table (as shown). The winner of the competition wants 10 know if he has broken the world record for the break shot of 32 mph. His ball landed a distance 12. 00 ft from the table edge. Calculate his break shot speed. Number mph At what speed did hes pool ball hit the ground? Number mphExplanation / Answer
find the time it takes to hit the floor
3.05 ft = 1/2 * 32ft/s2 * t2
t = .437 s
vy = at
vy = 32 * .437 = 13.97 ft/s downward
12 ft / .437 s = 27.46 ft/s * (3600s/hr) * (1mi/5280 ft) = 18.72 mph
total speed is (13.972 + 27.462) = 30.81 ft/s * (3600s/hr) * (1mi/5280 ft) =21 mph