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1. |
A man is standing on an international space station which is orbiting earth at an altitude 520km with a constant speed 7.6km/s. If the man’s weight is 50kg, his acceleration is$# |
A. | 7.6 km/s<sup>2</sup> |
B. | 7.6 m/s<sup>2</sup> |
C. | 8.4 m/s<sup>2</sup> |
D. | 10 m/s<sup>2</sup> |
Answer» D. 10 m/s<sup>2</sup> | |