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Unformatted text preview: Engineering Mechanics - Dynamics bt α 1 = −a b e Chapter 16 ⎛ r1 ⎞
⎝ r2 ⎠ α2 = ⎜ (α 2 r3)2 + (ω22r3) aP = 2 aP = 10.02 in
As t approaches ∞ ω1 = a ωf = r1
r2 ω1 vf = r3 ωf vf = 16.00 in
s Problem 16-10
The disk is originally rotating at angular velocity ω0. If it is subjected to a constant angular
acceleration α, determine the magnitudes of the velocity and the n and t components of
acceleration of point A at the instant t.
Given: ω0 = 8
2 s t = 0.5 s
r = 2 ft
Solution: ω = ω0 + α t vA = rω vA = 22.00 ft
s at = rα at = 12.00 ft
an = rω 2 an = 242.00 ft
2 s 401 ...
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- Spring '08