The International Space Station Has a Mass 1

Multiple Choice

The International Space Station has a mass 1.8 × 10⁵ kg. A 70.0-kg astronaut inside the station pushes off one wall of the station so she accelerates at 1.50 m/s². What is the magnitude of the acceleration of the space station as the astronaut is pushing off the wall relative to an observer initially at rest relative to the space station before the push?

A) 5.8 × 10^-4 m/s²
B) 1.50 m/s²
C) 4.7 × 10^-4 m/s²
D) zero
E) 3.9 × 10^-3 m/s²