Apparent Weight in a Spinning Space Station

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SUMMARY

The discussion focuses on calculating the apparent weight of an astronaut in a rotating space station with a radius of 150 m and a tangential speed of 30 m/s. The centripetal force formula, Fc = mv²/r, is applied, resulting in a reading of 450 N on the bathroom scale for a 75 kg astronaut. The calculation is confirmed as correct, emphasizing that only the centripetal force is relevant in this scenario, as both the astronaut and the space station are in free fall, negating the need to consider gravitational force.

PREREQUISITES
  • Understanding of centripetal force and its formula (Fc = mv²/r)
  • Basic knowledge of Newton's laws of motion
  • Familiarity with the concept of free fall in orbital mechanics
  • Ability to interpret and analyze force diagrams
NEXT STEPS
  • Study the implications of centripetal acceleration in rotating systems
  • Explore the effects of varying radius and speed on apparent weight in a space station
  • Learn about the principles of orbital mechanics and free fall
  • Investigate the design and engineering of rotating space habitats for artificial gravity
USEFUL FOR

Physics students, aerospace engineers, and anyone interested in the dynamics of rotating systems and artificial gravity in space environments.

HarleyM
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Homework Statement


To simulate gravity, a circular space station with a radius of 150 m is rotated so that astronauts standing on the inner surface move at 30 m/s. If the 75 kg astronaut stands on a bathroom scale what reading will it give? (assume the scale is calibrated in Newtons)


Homework Equations



Fc=mv2/r

The Attempt at a Solution



Fnet=Fc
=(75)(30)2/150
=450 N

So does this look correct? I am not really sure whether to include FN and FG or if they just cancel out.
Thanks!
 
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You should draw a diagram showing the forces acting on the astronaut... you will find that there is only one (of any consequence !) It is the force between the floor (wall !) of the space station and the astronaut.
This is the centripetal force and you have calculated it correctly.
You do not need to take gravity into account since the astronaut and the space station are in orbit i.e 'free fall'
 
Last edited:

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