quiz5a - Physics 1A Winter 2009: Quiz 5 Version A 1 Closed...

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Winter 2009: Quiz 5 Version A 1 03.03.08 Closed book. No work needs to be shown for multiple-choice questions. 1 . A wheel initially has an angular velocity of 18 rad/s but it is slowing at a rate of 2.0 rad/s 2 until it comes to a stop. By the time it stops it will have turned through: -> (a) 80 rad. (b) 160 rad. (c) 200 rad. (d) 300 rad. (e) 400 rad. 2 . If a wheel is turning at 3.0 rad/s, the time it takes to complete one revolution is about: (a) 0.3 s. (b) 0.6 s. (c) 1.0 s. (d) 1.3 s. -> (e) 2.0 s. 3 . What centripetal acceleration does an 80 kg person experience when seated 12 m from the center of a merry-go-round whose angular speed is 0.50 rad/s? (a) 20 m/s 2 . (b) 10 m/s 2 . -> (c) 5 m/s 2 . (d) 30 m/s 2 . (e) 0.1 m/s 2 . 4 . A 0.30-kg rock is swung in a circular path and in a vertical plane on a 0.25-m-length string. At the top of the path, the angular speed is 12.0 rad/s. What is the tension in the string at that point? ->
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This note was uploaded on 09/14/2009 for the course PHAR 1A taught by Professor Anderson during the Spring '09 term at UCSD.

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quiz5a - Physics 1A Winter 2009: Quiz 5 Version A 1 Closed...

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