2016CAP Prize Exam加拿大高中物理大獎(jiǎng)賽真題答案下載

歷年CAP High School Prize Exam加拿大高中物理大獎(jiǎng)賽

真題與答案下載

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2016 CAP Prize Exam完整版真題免費(fèi)下載

共計(jì)3小時(shí)考試時(shí)間

此套試卷由24道選擇題以及3道大題組成

每道大題含有不同數(shù)量的小題

請(qǐng)點(diǎn)擊訪問下方鏈接進(jìn)入下載頁面

2016 CAP Prize Exam完整版真題

2016CAP Prize Exam加拿大物理奧林匹克完整版答案免費(fèi)下載

部分真題答案預(yù)覽：

Part A選擇題部分：

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

Part B簡(jiǎn)答題部分

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.

? = ? ?+ (+)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 2.5?/s

Δ≈ 0.04=0.04=0.087320.04≈1.1≈4.0?

 

 

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