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]
Describe in words the motion of the object graphed in Fig. 2–29.
z/ ktl0 iokac7j0q- x/, qqk+h*+padd v/gjih0ldk 0t *u rb(--bsz: o
参考答案:
Initially,
the object moves in the positive direction with a constant acceleration, until
about t = 45 s, when it has a
velocity of about 37 m/s in the positive direction. The acceleration then decreases, reaching an
instantaneous acceleration of 0 at about t
= 50 s, when the object has its maximum speed of about 38 m/s. The object then begins to slow down, but
continues to move in the positive direction.
The object stops moving at t =
90 s and stays at rest until about t
= 108 s. Then the object begins to move
to the right again, at first with a large acceleration, and then a lesser
acceleration. At the end of the recorded
motion, the object is still moving to the right and gaining speed.
本题详细解析:
暂无
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