2017 AP Physics C物理C—Mechanics力学真题系列之Practice Exam选择题免费下载

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2017 AP Physics C Mechanics Practice Exam Multiple Choices Free Download

2017 AP 物理C力学模考选择题部分免费下载

此套题仅 p II含有简答题，

共计时45分钟，共35题

占总分50%

可以使用计算器

仅可使用铅笔

考试时会提供常用公式列表

部分真题预览：

5）Two identical, unlabeled boxes are transported to an orbiting space station. The astronauts know that one box is filled with a light sample of ants for an experiment, and the other is filled with heavy tools for repairs. How can the astronauts tell, without opening the boxes, which box has the tools?

1. Weigh each box on a spring scale. The box with the tools will have a higher reading.
2. Shake each box. The box with the tools will be harder to move back and forth.
3. Push each box. The box with the tools will travel farther before it stops.
4. Place each box on opposite sides of a balance. The box on the side that goes down lower will be the box with the tools.
5. Toss each box straight up. The box with the tools will go higher before coming back down.

8）A ball of mass m is dropped from rest from a height h and collides elastically with the floor, rebounding to its original height. What is the magnitude of the average force applied by the floor on the ball during the time the ball is in contact with the floor?

1. Zero
2. mg
3. 2mg
4. 4mg
5. It cannot be determined without knowing the length of time that the ball is in contact with the floor.

17 )Which of the following properties of the two-disk system must be conserved between the time the second disk is dropped on the first disk and the time that the two disks begin rotating with the same speed?

1. Kinetic energy only
2. Angular momentum only
3. Both kinetic energy and angular momentum
4. Neither kinetic energy nor angular momentum
5. It cannot be determined without knowing the nature of the forces between the two disks.

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