本题目来源于试卷: Circular Motion，类别为 美国物理杯赛(Physics Bowl)
[单选题]
13.23: A small object/t(p 0d::qarmsxxm6s of mass 11.0g is at rest 30.0 cmo abnwn4olxe , f:449q from a horizontal disk’s center. The disk starq9nw o,4:f exlab4o4nts to rotate from rest about its center with a constant angular acceleration of $4.50 rad/s^{2}$ . What is the magnitude of the net force acting on the object after a time of t=1/3 s if the object remains at rest with respect to the disk?
A. $0N$
B. $7.43× 10^{−3}N$
C. $1.49× 10^{−2}N$
D. $1.66× 10^{−2}N$
E. $2.23× 10^{−2}N$
参考答案: D
本题详细解析:
暂无
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