本题目来源于试卷: gc textbook chapter 2 Kinematics in One Dimension，类别为 IB物理学
[问答题]
Which one of these motions is not at constant accelera nvvl4xll47y9tion: a wsji )6a vh,8nrock falling from a cliff, an elevator moving from the second floor to tnv hw,ja6 i)8she fifth floor making stops along the way, a dish resting on a table?
参考答案: The elevator
moving from the second floor to the fifth floor is NOT an example of constant
acceleration. The elevator accelerates
upward each time it starts to move, and it accelerates downward each time it
stops.
Ignoring air
resistance, a rock falling from a cliff would have a constant
acceleration. (If air resistance is
included, then the acceleration will be decreasing as the rock falls.) A dish resting on a table has an acceleration
of 0, so the acceleration is constant.
本题详细解析:
暂无
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