problem07_46

University Physics with Modern Physics with Mastering Physics (11th Edition)

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7.46: a) . ) 2 ( 2 2 1 A B A mv R h mg U U = - = - From previous considerations, the speed at the top must be at least . gR Thus, . 2 5 or 2 1 ) 2 ( R h mgR, R h mg - b) , K Rmg U U C C A = = - ) 50 . 2 ( so . s m 3 . 31 ) m 0 . 20 )( s m 80 . 9 )( 00 . 5 ( ) 00 . 5 ( 2 = = = gR v C The radial acceleration is . s m 0 . 49 2 rad 2 = = R v C a The tangential direction is down, the
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Unformatted text preview: normal force at point C is horizontal, there is no friction, so the only downward force is gravity, and . s m 80 . 9 2 tan = = g a...
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