Question

As astronaut, inside an earth satellite, experiences weightlessness because.

• A. No external force is acting on him
• B. He is falling freely
• C. No reaction is exerted by the floor of the satellite
• D. He is far away from the earth's surface

Answer 1

Answer: (B), (C)

The correct options are
B He is falling freely
C No reaction is exerted by the floor of the satellite

Astronauts feels weightlessness in a satellite because they are freely falling. This is because normal reaction force exerted is zero. So, a person in free fall does not experience any contact force and thus feels weightless. No, reaction is exerted by the floor of the satellite or it is also under free fall. Hence $\left(B\right)$ and $\left(C\right)$ are correct.