Circular Motion (id: f91fc71f5)

本题目来源于试卷: Circular Motion，类别为 美国物理杯赛(Physics Bowl)

[单选题]
94.15: A car is traveling p, )c)kmh cf;fkhe::b on a road in hilly terrain, see figu 9 1f8kmlkz(rve7ey n yg6 lmw1a7;o;vre to the right. Assume the car has speed v and the tops and bottoms o8k o6m vy (akz1w1lg79ry nlfe7m v;;ef the hills have radius of curvature R. The driver of the car is most likely to feel weightless:

A. at the top of a hill when $v >\sqrt{gR}$
B. at the bottom of a hill when $v >\sqrt{gR}$
C. going down a hill when $v = \sqrt{gR}$
D. at the top of a hill when $v <\sqrt{gR}$
E. at the bottom of a hill when $v <\sqrt{gR}$


参考答案:  A


本题详细解析: 暂无

微信扫一扫，分享更方便