SAT Subject Physics Practice Question 409: Answer and Explanation
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?
B. 0.25 g
C. 0.5 g
D. 0.75 g
E. 1 g
Correct Answer: A
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.