2008 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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2008 AP Physics C Mechanics Free-Response Questions Free Download

2008 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 skier of mass M is skiing down a frictionless hill that makes an angle θ with the horizontal, as shown in the diagram. The skier starts from rest at time t = 0 and is subject to a velocity-dependent drag force due to air resistance of the form F = -bv, where v is the velocity of the skier and b is a positive constant. Express all algebraic answers in terms of M, b, θ , and fundamental constants.

1. On the dot below that represents the skier, draw a free-body diagram indicating and labeling all of the forces that act on the skier while the skier descends the hill.
2. Write a differential equation that can be used to solve for the velocity of the skier as a function of time.
3. Determine an expression for the terminal velocity v_T of the skier.
4. Solve the differential equation in part (b) to determine the velocity of the skier as a function of time, showing all your steps.
5. On the axes below, sketch a graph of the acceleration a of the skier as a function of time t, and indicate the initial value of a. Take downhill as positive.

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