Thursday

July 31, 2014

July 31, 2014

Posted by **AL** on Sunday, July 1, 2012 at 4:58pm.

- Physics -
**bobpursley**, Sunday, July 1, 2012 at 5:03pmUse bernoulli's equation to find the velocity of the water leaving when the depth is the full cup. From height of the hole (assume vertical free fall), and velocity, calculate horizontal distance.

- Physics -
**Elena**, Monday, July 2, 2012 at 6:42amh=0.15 m, hₒ=0.09 m.

Bernoulli’s equation between the top surface and the exitting stream:

Pₒ+0+ρghₒ=Pₒ+ρv²/2+ ρgh,

v² = 2g(hₒ-h),

v=sqrt{2g(hₒ-h)}=sqrt{2•9.8•(0.15-0.09)} =1.08m/s.

y=h=gt²/2.

t=sqrt(2h/g) =sqrt(2•0.09/9.8)=0.135 s.

x=vt=1.08•0.135=0.146 m = 14.6 cm

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