Let's mess around little bit of what we got, with a little twist of Physics. Don't blame us college kids! It is the truth that's calling. What an overwhelming call that is!
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Showing posts with label Conservation of Energy. Show all posts
Showing posts with label Conservation of Energy. Show all posts
Saturday, March 26, 2011
Sunday, February 28, 2010
Fox 253 Solution

Bleaug goes on:
Energy acquired in free fall from rest position is 1/2.mV2=mg(h0-1/2)
Vertical velocity after bounce is V reduced by a factor equal to cos(2a), where a is the angle of tangent to 1/x at B: Vy = V.cos(2a) and tan(a)=-1/4
Highest point reached after bounce is such that: 1/2.mVy2=mg(h-1/2), so h = 1/2 + cos(2a)2.(h0-1/2)
From simple trigonometry we get cos(2a) = 1-tan(a)2/(1+tan(a)2) = 15/17
So h = 1/2 + (15/17)2 . (h0-1/2) = 1/2 + (225/289). 289/2 = 113.
Wednesday, February 24, 2010
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