ng.com/ibiscms/modlibis/view.php?id 3390899 U 2117/2017 1000 S0/100 Print caoula

Question

ng.com/ibiscms/modlibis/view.php?id 3390899 U 2117/2017 1000 S0/100 Print caoulator Periodic Table 9 13 players often pride themselves on ability to impart a billiards, event one of rails pool table Dalow oftheir measure the speed removed a ballcan opening shot of a game in which the player strikes aball with his pool With the the y participant a physics background, they have placed youincharge of determining the speed of te break shots 0,850 m 405 m The top of the pool table is 0850m tom the noor. The placement ofthe tape s such hatomis aligned with table edge, calaulate his break shot speed, m/s At what speed did his pool bal hit the ground? m/s O Previous check Answer ONee For m eTe o Web

Explanation / Answer

Vertical distance covered = 0.850 m
Horizontal distance covered = 4.05 m

time taken, t
s = 1/2*9.8*t^2
0.850 = 4.9 * t^2
t = 0.416 s

x = v * t
v = 4.05 / 0.416
v = 9.74 m/s

His break shot speed = 9.74 m/s
so clearly he has not broken the world record !!

Speed with which pool ball hit the ground,
v = sqrt(vx^2 + vy^2)
vy = 9.8 * 0.416 = 4.08 m/s

v = sqrt(9.74^2 + 4.08^2)
v = 10.56 m/s

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