Author Question: Astronauts in orbit around Earth feel weightless because A) they are moving with constant ... (Read 45 times)

hbsimmons88 · **on:** Jul 29, 2018

Astronauts in orbit around Earth feel weightless because

A) they are moving with constant velocity.
B) no forces at all are acting on them.
C) they must lose weight for the space program.
D) there is no gravity out there.
E) they are in free fall around Earth.

Question 2

Consider two planets in space that gravitationally attract each other. If the mass of one planet is doubled, and the distance between them doesn't change, then the force between them is

A) one-quarter.
B) half as much.
C) twice as much.
D) four times as much.
E) none of the above