Fields D.1 Gravitational Fields & Potential (id: bef1552cf)

本题目来源于试卷: Fields D.1 Gravitational Fields & Potential ，类别为 IB物理学

[填空题]
1.A space probe lands on the surface ge9b 08 l tl q)2qidxn9r6 ;hv9dpn3laof o 1gs- bet5ib+a planet which has the same radius as the Earth, and a gravitational fib-+gites 15b oeld strength of $6.7Nk{g}^{-1}$ at its surface.
(1)The mass of Earth is given as $5.98\times {10}^{24}kg$. Show that the planet’s mass is approximately $4\times {10}^{24}kg$. $m_{planet}$ =    $\times {10}^{24}kg$
(2)The average radius of the planet is $6.37\times {10}^3$ km. Calculate the planet's average density in SI base units.
(3)The planet is at a distance of $1.43\times {10}^{11}m$ from the Earth. Calculate the gravitational force between the Earth and the planet.
3.(1)Calculate the magnitude of the resultant gravitational field strength between the planet and the Earth at point $X$, which is located $\frac{1}{3}$ of the total distance between the planets when measured from the Earth. $g_{planet}$ =    $\times {10}^{-9}NKg-1$

(2)Suggest a reason why your answer above is only an estimate.
3.(1)The planet has a moon with an orbital radius of $1.20\times {10}^{7}m$. Show that the acceleration of this moon is approximately $1.9m{s}^{-2}$.
(2)Calculate the angular speed of this moon.
(3)Determine the orbital period of this moon, in hours. h =    $h$

参考答案:
空格1: 4.12±2%  空格2: 30.2±2%  空格3: 4.4±2% 


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