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]
Can an object be increas0 9 to whz;x6e0coxxutg0ow19ing in speed as its acceleration decreases? If so, give xttoozxhoe1;x 0u0 cw 0g9w69 ro)(jiok5g3 vz l7:loan example. I l(olzj7)53io ogrk v:f not, explain.
参考答案: Assume that north
is the positive direction. If a car is
moving south and gaining speed at an increasing rate, then the acceleration
will be getting larger in magnitude.
However, since the acceleration is directed southwards, the acceleration
is negative, and is getting more negative.
That is a decreasing acceleration as the speed increases. Another example would be an object
falling WITH air resistance. As the
object falls, it gains speed, the air resistance increases. As the air resistance increases, the
acceleration of the falling object decreases, and it gains speed less quickly
the longer it falls.
本题详细解析:
暂无
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