Saturday

December 20, 2014

December 20, 2014

Posted by **James** on Sunday, November 24, 2013 at 11:29pm.

The top of the pool table is 0.770 m from the floor. The placement of the tape is such that 0 m aligns to the edge of the table (as shown). The winner of the competition wants to know if he has broken the world record for the break shot of 32 mph (about 14.3 m/s). The ball landed a distance 5.15 m from the table edge, calculate his break shot speed.

At what speed did his pool ball hit the ground?

- Science, Physics, math, calculus -
**Henry**, Monday, November 25, 2013 at 3:04pma. h = 0.5g*t^2 = 0.77

4.9t^2 = 0.77

t^2 = 0.1571

t = 0.396 s. = Fall time.

Dx = Xo * t = 5.15 m.

Xo * 0.396 = 5.15

Xo = 13 m/s = Break speed.

b. V^2 = Vo^2 + 2g*h

V^2 = 0 + 19.6*0.77 = 15.09

V = 3.88 m/s

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