The spacecraft produced an upward force of thrust that was equal to the downward force of gravity.
The spacecraft produced an upward force of thrust that was greater than the downward force of gravity.
The spacecraft produced a downward force of thrust that was equal to the downward force of gravity.
The spacecraft produced a downward force of thrust that was less than the downward force of gravity.
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A spacecraft leaves the surface of the Earth by producing an upward force of thrust that is greater than the downward force of gravity. This is necessary to overcome the gravitational pull of the Earth and achieve lift-off. Therefore, the correct option is:
The spacecraft produced an upward force of thrust that was greater than the downward force of gravity.
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