2016CAP 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

真题与答案下载

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2016 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24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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2016 CAP Prize Exam完整版真题

2016CAP 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. B
2. A
3. D
4. B
5. D

Part B简答题部分

Problem 2 B.

Gravitational force is the only force that acts on the system of the snowmobile and the rider in the air, therefore the total external torque around the center of the mass of the system is zero and the angular momentum around this point should remain constant.

Since the weight of the rotating track is comparable to the weight of the system, any change in its rotational speed results in a rotation of the snowmobile in the opposite direction. So if the rider accelerates the front of the snowmobile will move upward and if the person brakes it will move down.

In this question, the rider should decelerate to tilt the head down and accelerate back to the previous speed to keep it at that angle. Since there is no drag force on the track, we assume that any deceleration and acceleration can happen almost instantly (compared to the jump time).

 

From the pictures we approximate the radius of gyration to be 1 m for the system of the rider and the snowmobile and 0.5 m for the track.

ℎ = ℎ −+ (+)2= 0

Where V0 is the velocity of rotation of the snowmobile before braking.

After applying the brakes we have:

= (−0)+ 2≈(0.04)()

Assuming that the jump time is around 2 seconds, the desired ω should be 2.5⁰/s

Δ≈ 0.04=0.04=0.087320.04≈1.1≈4.0ℎ

 

 

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