Acomputer is reading data from a rotating cd-rom. at a point that is 0.0130 m from the center of the disk, the centripetal acceleration is 393 m/s2. what is the centripetal acceleration at a point that is 0.0884 m from the center of the disc?
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Ответ:
The formula relating acceleration and angular velocity is:
a = ω^2 r
where a is acceleration, ω is angular velocity and r is radius
But the angular velocity ω is constant all throughout the disk therefore:
a1 / r1 = a2 / r2
So at points:
r1 = 0.0130 m -> a1 = 393 m/s^2
r2 = 0.0884 m -> a2 = ?
393 / 0.0130 = a2 / 0.0884
a2 = 2,672.4 m/s^2
Ответ:
the correct answer is 27 hours per week :) hope this helps