Which of the following is true of the strength of a gravity field? A. Gravity field strength is directly proportional to the distance between the objects. B. Gravity field strength is inversely proportional to the distance between the objects. C. Gravity field strength is directly proportional to the square of the distance between the objects. D. Gravity field strength is inversely proportional to the square of the distance between the objects.
20. Escape velocity is the speed at which an object will break free of a planet or moon’s gravity and enter orbit.
A spacecraft leaving the surface of the Earth needs to be going 7 miles per second, or nearly 25,000 miles per hour to enter orbit. Which of the following is true of the strength of a gravity field?
A. Gravity field strength is directly proportional to the distance between the objects.
B. Gravity field strength is inversely proportional to the distance between the objects.
C. Gravity field strength is directly proportional to the square of the distance between the objects.
D. Gravity field strength is inversely proportional to the square of the distance between the objects.
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