本题目来源于试卷: Physics Unit5: Circular Motion & Gravitation，类别为 通用国际物理
[单选题]
A roller coaster car is on a trac.qrfh , 7x;ygik thal(axwa 2 sjg3eps)8 c:t forms a circular loop in the vertical plane. If the car is to just maintain contact with track at the top of the loop, what is the min2jpw(:8)seaag sc3 xlimum value for its centripetal acceleration at this point?
A. g downward
B. 0.5g downward
C. g upward
D. 2g upward
参考答案: A
本题详细解析:
暂无
| 
