College Physics章节测试课后答案2024秋

第三章单元测试

1. A particle moves along x axis, from x = 0 m to x = 10 m and then back to x = 5 m. What are the displacement s and distance d of the motion （ ）


A:s = 15 m, d = 15 m B:s = 5 m, d = 15 m C:s = 5 m, d = 5 m
D:s = 15 m, d = 5 m
答案:s = 5 m, d = 15 m

2. A particle moves with a constant acceleration from rest along x axis, from x = 0 m to x = 10 m in 5 s. What is the acceleration.（ ）

A: B: C: D:
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3. In linear motion, if the acceleration is opposite to the initial velocity, which of the following statements are correct.（ ）

A:The distance for a particular time can be zero B:The displacement for a particular time interval can be zero C:The velocity at a particular time can be zero D:The average velocity for a particular time interval can be zero
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4. The motion equation of a particle is . At , which of the following results are correct. （ ）。

A:acceleration B:velocity C:velocity D:acceleration
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5. In linear motion, if the velocity does not change its direction, the magnitude of displacement will be equal to the distance. （ ）

A:错 B:对
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