101119 - Physics 121 11/19/10 11/19/10 Physics 121 1...

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Physics 121 11/19/10 Prof. E. F. Redish 1 11/19/10 1 Physics 121 11/19/10 2 Physics 121 11/19/10 3 Physics 121 E i = E f 1 2 mv i 2 + 1 2 I ± i 2 + mgh i = 1 2 mv f 2 + 1 2 I f 2 + mgh f mgh = 1 2 mv f 2 + 1 2 I f 2 = v / R mgh = 1 2 mv f 2 + 1 2 I v f R ² ³ ´ µ · 2 = 1 2 mv f 2 + 1 2 I R 2 ² ³ ´ µ · v f 2 = 1 2 m 1 + I mR 2 ¸ ¹ º » ¼ ½ v f 2 v f 2 = 2 gh 1 + I mR 2 ¸ ¹ º » ¼ ½
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Physics 121 11/19/10 Prof. E. F. Redish 2 11/19/10 4 Physics 121 11/19/10 5 Physics 121 V (m 3 ) m (kg) V m V m ± ± = = ² 11/19/10 6 Physics 121
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Physics 121 11/19/10 Prof. E. F. Redish 3 11/19/10 8 Physics 121 2 2 1 1 A W A W = 11/19/10 9 Physics 121 11/19/10 10 Physics 121 F A The force takes its direction from A. F pF p A A == ± ± Pressure has no direction! It acts in all directions at once!
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Physics 121 11/19/10 Prof. E. F. Redish 4 11/19/10 11 Physics 121 T T T T 11/19/10 12 Physics 121 11/19/10 14 Physics 121 F = p 0 A (could be outside air pressure or due to external weights)
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This note was uploaded on 12/28/2011 for the course PHYSICS 121 taught by Professor Shawhan during the Spring '10 term at Maryland.

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101119 - Physics 121 11/19/10 11/19/10 Physics 121 1...

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