2009 AP Physics C物理C—Mechanics力学真题系列之简答题免费下载

历年AP Physics物理学系列

真题与答案下载

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2009 AP Physics C Mechanics Free-Response Questions Free Download

2009 AP 物理C力学简答题部分免费下载

此套题仅 p II含有简答题，

共计时45分钟，共3题

占总分50%

每道大题可能含有不同数量的小题

可以使用计算器

部分真题预览：

1）A 3.0 kg object is moving along the x-axis in a region where its potential energy as a function of x is given as U(x) = 4.0x² , where U is in joules and x is in meters. When the object passes the point x = -0.50 m, its velocity is +2.0 m/s. All forces acting on the object are conservative.

1. Calculate the total mechanical energy of the object.
2. Calculate the x-coordinate of any points at which the object has zero kinetic energy.
3. Calculate the magnitude of the momentum of the object at x = 0.60 m.
4. Calculate the magnitude of the acceleration of the object as it passes x = 0.60 m.
5. On the axes below, sketch graphs of the object’s position x versus time t and kinetic energy K versus time t. Assume that x = 0 at time t = 0 . The two graphs should cover the same time interval and use the same scale on the horizontal axes.