Natural Science
Undergraduate
答案都是8.79
9.21 A wheel of diameter 20.0 cm starts from rest and rotates
with a constant angular acceleration of 3.50 rad/s². Compute the radial
acceleration of a point on the rim for the instant the wheel completes
its second revolution from the relationship (a) arad
w'r and
(b) arad = v²/r.
=
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