Question

first, we descended from hermes, and decelerated our orbital velocity so we could start falling properly. source: the martian in this sentence, velocity means: distance travelled per unit time in one direction any device that bears the weight of another thing the quality of having an even surface or texture the attribute of being so near as to be touching

Explanation:

Velocity in physics and general usage refers to the rate of change of position with respect to time in a specific direction, which is the first - given definition. The other options are definitions of different concepts.

Answer:

distance travelled per unit time in one direction