2012 AP Physics C物理C—Mechanics力学真题系列之Practice Exam简答题免费下载

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2012 AP Physics C Mechanics Practice Exam Free-Response Questions Free Download

2012 AP 物理C力学模考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）Experiment 1. A block of mass 0.30 kg is placed on a frictionless table and is attached to one end of a horizontal spring of spring constant k, as shown above. The other end of the spring is attached to a fixed wall. The block is set into oscillatory motion by stretching the spring and releasing the block from rest at time t = 0. A motion detector is used to record the position of the block as it oscillates. The resulting graph of velocity u versus time t is shown below. The positive direction for all quantities is to the right.

1. Determine the equation for u(t) , including numerical values for all constants.
2. Given that the equilibrium position is at x = 0 , determine the equation for x(t), including numerical values for all constants.
3. Calculate the value of k. Experiment 2. The block and spring arrangement is now placed on a rough surface, as shown below. The block is displaced so that the spring is compressed a distance d and released from rest.
4. On the dots below that represent the block, draw and label the forces (not components) that act on the block when the spring is compressed a distance x = d 2 and the block is moving in the direction indicated below each dot.
5. Draw a sketch of u versus t in this case. Assume that there is a negligible change in the period and that the positive direction is still to the right.

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