1999CAP Prize Exam加拿大高中物理大奖赛真题答案下载

历年CAP High School Prize Exam加拿大高中物理大奖赛

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1999 CAP Prize Exam完整版真题免费下载

共计3小时考试时间

此套试卷由25道选择题以及3道大题组成

每道大题含有不同数量的小题

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1999 CAP Prize Exam完整版真题

1999CAP Prize Exam加拿大物理奥林匹克完整版答案免费下载

部分真题答案预览：

Part A选择题部分：

1. C
2. B
3. D
4. C
5. A

Part B简答题部分

Solution to Problem 2：

(a) Immedaitely before its collision with the second bead,

the first bead has a speed of v1= 2Fd/m. Immedi­ately afterwards, it has a speed of zero.

(b) Immedaitely before its collision with the third bead,

the second bead has a speed of v1= 2Fd/m. Imme­

diately afterwards, it has a speed of zero.

(c) The time between subsequent collisions of the first bead with the second is governed by

where a = F/m so that the average speed of the first bead is vo = d/t = v1/2. The first bead moves at an average speed which is half the speed v1 of the shock wave that travels down the wire.

(d) Suppose that after a time, the clump of beads that have collided (and are all stuck together) is travelling with a constant (terminal) velocity v. InatimeintervalΔt there are vΔt/d further collisions increasing the mass of the clump by mvΔt/d and increasing the momentum of the clump by mv²Δt/d. Since F =Δp/Δt, v =

h √

Fd/m. The shock wave moves at a speed of v1 / 2.

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