Fields D.1 Gravitational Fields & Potential (id: 725300467)

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

[单选题]

An astronaut in a space station orbiting the earth experiences weightlessness.

The following are three statements about the astronaut and the space station:

I.]I.]II. The centripetal acceleration of the space station is equivalent to the gravitational field strength at that location

III.]III.]Which of these statements is correct?

A. $I$ and $II$ only
B. $I$ and $III$ only
C. $II$ and $III$ only
D. $I$, $II$ and $III$


参考答案:  C


本题详细解析:
Explanation:

Statement I is incorrect. This is due to Newton’s Law of Gravitation. The astronaut will experience gravitational force from the Earth that acts as the centripetal force.

Since the centripetal force is the gravitational force, then the centripetal acceleration is equal to the gravitational field strength at that point. Therefore both the astronaut and the space station experience the same acceleration. Then statements II and III are correct.

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