There isnt enough information to answer the question, the missing variable is "distance from said falling spot and ground"
You're right, Answer C
The dust and gas accumulate to form a solar nebula, which later on creates the star and the planets.
Centripetal acceleration is (speed-squared) / (radius)
CA = (6 m/s)² / (9 m)
CA = (36 m²/s²) / (9 m)
CA = (36/9) (m²/m·s²)
<em>Centripetal acceleration = 4 m/s²</em>
