Quiz1 - answer numerically in degrees s-2 Solution ∆θ = 360 o x 20.0 = 7200 o ∆ t = 5.0 s so the initial velocity ω = ∆θ/∆ t = 7200

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PHY126 Quiz No. 1 (Chap.10) Name: Dario, a prep cook at an Italian restaurant, spins a salad spinner 20.0 times in 5.00 seconds and then stops spinning it. The salad spinner rotates 6.00 more times before it comes to rest. Assume that the spinner slows down with constant angular acceleration. What is the angular acceleration of the salad spinner as it slows down? Express your
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Unformatted text preview: answer numerically in degrees s-2 . Solution: ∆θ = 360 o x 20.0 = 7200 o , ∆ t = 5.0 s, so the initial velocity ω = ∆θ/∆ t = 7200 o /5.00 s = 1440 degrees s-1 . The spinner rotates further 6.00 times and then it stops. So using ω 2 = ω 2 +2α(θ−θ ) , and θ − θ 0 = 6.00 x 360 o = 2160 o , α =-480 degrees s-2 ....
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This note was uploaded on 05/28/2011 for the course PHY 126 taught by Professor Staff during the Summer '08 term at SUNY Stony Brook.

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