If Keiji and Zoya are in a spaceship that is in a stable orbit around the Earth, and Keiji is holding a pen loosely between his fingers, what happens to the pen if he lets go of it? Provide a very short response.
The pen will remain floating next to Keiji's fingers. Since the spaceship, Keiji, Zoya, and the pen are all experiencing microgravity, there is no net force pulling the pen in any specific direction relative to the inside of the spaceship. The pen will stay in the same position relative to Keiji and the spaceship unless acted upon by another force, such as being pushed or bumped.