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 m3i +( ms8zs3md9uczk8( obd8xszuw6 io 9n 6dkn3wld-t8ttp ;itions is not at constant acceleration: a rock falling from a cliff, an elevator moving from the senpt ;6lwkdtt d-9i3 8ncond floor to the 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
| 
