The acceleration of gravity is a constant equal to _______ meters per second squared.
A. 7.6
B. 8.4
C. 10.2
D. 9.8

The acceleration due to gravity is NOT constant. [ For example, on the Moon it is approximately one sixth of what it is on Earth, and it differs all over the Universe.
I can only assume that the question is asking about the APPROXIMATE gravitational acceleration on EARTH, in which case the answer is D. 9.8 ]

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