A spaceship in orbit around the earth at an altitude of 30,000 km. Which stateme

Question

A spaceship in orbit around the earth at an altitude of 30,000 km. Which statement explains why the astronauts experience "weightlessness"?

1) Spaceship is in free fall and its floor cannot press upwards on the astronaut

2) The pull of the spaceship is cancelled by the pull of the other planets

3) The centripetal force of the earth on the astronaut in orbit is 0 Newtons

4) The force of the earth on the spaceship and the force of the spaceship on the earth cancel since they are equal in magnitude and opposite in direction

Please pick correct answer and give a very quick explanation

Thanks

Explanation / Answer

1) Spaceship is in free fall and its floor cannot press upwards on the astronaut ... Explanation: take an example of free fall of a person in lift.here normal force =weight..hence net force=0.......likewise here also the astronaut feel weightlessness.normalforce=wegut.hence cancelled

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