Suppose a spacecraft orbits the moon in a very low, circular orbit, just a few hundred meters above the lunar surface. the moon has a diameter of 3500 km, and the free-fall acceleration at the surface is 1.6m/s2. how fast is this spacecraft moving?
a. 53 m/s
b. 75 m/s
c. 1700 m/s
d. 2400 m/s

Spacecraft will be moving in 1700 m/s.

Option C

The diameter of the moon is 3500 km and the free fall acceleration at the surface is given as  

The radius will be half of the diameter of the moon that can be written as:  

By the application of the equation for orbit speed, we get  

answer: its c lololo

i think the answer would be b