本题目来源于试卷: Circular Motion，类别为 美国物理杯赛(Physics Bowl)
[单选题]
10.35 A point object w )f7 ;gwaj ngl5it p;n ,cocl74j yq0eg3d5t/gmmh mass M = 2.0 kg is attached a distance R =1.75 m from the fixed center of a disk as shown in the fig 4 oqpglgmd,53m tceny/7cj; 0ure. The disk starts rotating from rest with constant angular acceleration $α =5.00 rad/s^{2}$ about an axis perpendicular to the plane of the page through the disk’s center. After how much time (in seconds) is the tangential component of the point object’s acceleration equal in magnitude to the centripetal component of the point object’s acceleration?
A. 0.769
B. 0.592
C. 0.500
D. 0.447
E. 0.350
参考答案: D
本题详细解析:
暂无
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