2017年AP物理1简答题真题+答案+PDF下载
1. (7 points, suggested time 13 minutes)
In the three circuits shown above, the batteries are all identical, and the lightbulbs are all identical. In circuit 1 a single lightbulb is connected to the battery. In circuits 2 and 3, two lightbulbs are connected to the battery in different ways, as shown. The lightbulbs are labeled A–E.
(a) Rank the magnitudes of the potential differences across lightbulbs A, B, C, D, and E from largest to smallest. If any lightbulbs have the same potential difference across them, state that explicitly.
Ranking:
Briefly explain how you determined your ranking.
(b) The batteries all start with an identical amount of usable energy and are all connected to the lightbulbs in the circuits at the same time.
In which circuit will the battery run out of usable energy first?
____ Circuit 1 ____ Circuit 2 ____ Circuit 3
In which circuit will the battery run out of usable energy last?
____ Circuit 1 ____ Circuit 2 ____ Circuit 3
In a clear, coherent paragraph-length response that may also contain equations and drawings, explain your reasoning.
2. (12 points, suggested time 25 minutes)
A student wants to determine the coefficient of static friction between a long, flat wood board and a small wood block.
(a) Describe an experiment for determining the coefficient of static friction between the wood board and the wood block. Assume equipment usually found in a school physics laboratory is available.
i. Draw a diagram of the experimental setup of the board and block. In your diagram, indicate each quantity that would be measured and draw or state what equipment would be used to measure each quantity.
ii. Describe the overall procedure to be used, including any steps necessary to reduce experimental uncertainty. Give enough detail so that another student could replicate the experiment.
(b) Derive an equation for the coefficient of static friction in terms of quantities measured in the procedure from part (a).
A physics class consisting of six lab groups wants to test the hypothesis that the coefficient of static friction between the board and the block equals the coefficient of kinetic friction between the board and the block. Each group determines the coefficients of kinetic and static friction between the board and the block. The groups’ results are shown below, with the class averages indicated in the bottom row.
(c) Based on these data, what conclusion should the students make about the hypothesis that the coefficients of static and kinetic friction are equal?
____ The static and kinetic coefficients are equal.
____ The static and kinetic coefficients are not equal.
Briefly justify your reasoning.
(d) A metal disk is glued to the top of the wood block. The mass of the block-disk system is twice the mass of the original block. Does the coefficient of static friction between the bottom of the block and the board increase, decrease, or remain the same when the disk is added to the block?
___ _ Increase ____ Decrease ____ Remain the same
Briefly state your reasoning.
2017年AP物理1简答题真题余下省略！
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