SAT Subject Physics Practice Question 409: Answer and Explanation

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Question: 409

15. The International Space Station is currently under construction. Eventually, simulated earth gravity may become a reality on the space station. What would the gravitational field through the central axis be like under these conditions?

A. zero
B. 0.25 g
C. 0.5 g
D. 0.75 g
E. 1 g

Correct Answer: A

Explanation:

The correct answer is (A). The central axis would have a gravitational force of zero because there is no radial distance to provide a centripetal acceleration or centripetal force.

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