Space Time & Motion A.3 Work Energy and Power (id: d146f0489)

本题目来源于试卷: Space Time & Motion A.3 Work Energy and Power，类别为 IB物理学

[填空题]
Ⅰ.The diagram below shows a water slide. As a test, an object is released from point $A$,$6.0m$ above the ground level. Point $B$ at the end of the slide is $2.0\,m$abovethegroundlevel.Location$C$ is the point of contact of the slide with the ground. The slide approximates a circular shape at this point.

Air resistance and friction on the object are negligible.
1.Draw the free-body diagram of the forces acting on the object as it passes point $D$.

2.At the instant the object passes point $C$, explain why there is acceleration and yet no work is done.
Ⅱ.The object slides from point $A$ to point $B$ and is launched from point $B$ with an angle.
1.The speed of the object at point $B$ is approximately   $m{s}^{-1}$
2.At point $B$, on the object is launched into the air and lands in a pool of water that is $2.2m$ below point $B$.
After $1.1s$, it reaches the surface of the water. The angle $\theta$ of the launch above the horizontal is approximately   ${}^{\circ }$.
3.Calculate the horizontal distance travelled by the object between losing contact with the slide and reaching the water.  m

参考答案:
空格1: 8.86±5%  空格2: 22.3±5%  空格3: 9.1±5% 


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