problem09_70

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

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9.70: a) The angular acceleration will be zero when the speed is a maximum, which is at the bottom of the circle. The speed, from energy considerations, is β β where ), cos 1 ( 2 2 - = = gR gh v is the angle from the vertical at release, and s. rad 25 . 1 ) 36.9 cos 1 ( ) m 50 . 2 ( ) s m 80 . 9 ( 2 ) cos 1 ( 2 2 = ° - = - = = β ϖ R g R v b) α will again be 0 when the meatball again passes through the lowest point.
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Unformatted text preview: c) rad a is directed toward the center, and . s m 93 . 3 ) m 50 . 2 ( ) s rad 25 . 1 ( , 2 2 rad 2 rad = = = a R ω a d) ), cos 1 )( 2 ( ) cos 1 )( 2 ( 2 rad β g R β R g R a-=-= ϖ = independent of R ....
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