What forces affect an astronaut?

In summary, the conversation discusses gravity and centrifugal/centripetal forces and their relation to different frames of reference. It also mentions the concept of "fictitious forces" that only appear in accelerated frames. The conversation then presents two scenarios for analysis: an astronaut hovering in a cabin in orbit and an astronaut circling the Earth from the perspective of someone on Earth.
  • #1
davomil999
1
0
Homework Statement
What forces affect a freely floating astronaut on the ISS. a)in the frame of reference of the station b) from the point of view of a person on earth. Justify your answers.
Relevant Equations
no equations needed as far as i know, if any then maybe F = G * ((m1*m2)/r^2)
Well the first one that comes to mind is gravity and maybe centrifugal/centripetal force. I imagine that forces such as drag shouldn't even be considered. I find it difficult to imagine which belong to which frame of reference.
 
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  • #2
davomil999 said:
I find it difficult to imagine which belong to which frame of reference.
Some "forces" (so-called "fictitious forces") only appear when analyzing things from an accelerated frame.
 
  • #3
a) In the frame of reference of the station -- which is in orbit around the Earth, if the astronaut is hovering in the middle of a cabin without hitting anything, how is that happening?
b) From the point of view of a person on earth, the astronaut circles the Earth several times a day. How is that happening?

Take a shot at them. We will be gentle.
 

1. What is microgravity and how does it affect astronauts?

Microgravity is the condition in which objects or people appear to be weightless. In space, the force of gravity is greatly reduced because of the distance from Earth's center. This can cause astronauts to experience changes in their body, such as muscle and bone loss, as well as difficulties with balance and coordination.

2. How does radiation in space affect astronauts?

Radiation in space can affect astronauts in a number of ways, including an increased risk of developing cancer, damage to the immune system, and potential damage to DNA. To protect against radiation, astronauts wear special suits and helmets and are also shielded by their spacecraft.

3. What role do solar flares play in affecting astronauts?

Solar flares are sudden bursts of energy from the sun that can release high levels of radiation into space. If astronauts are exposed to these solar flares, they can experience symptoms such as nausea, fatigue, and even an increased risk of developing cancer.

4. How does the lack of atmospheric pressure in space affect astronauts?

In space, there is no atmospheric pressure, which means there is no air to breathe. This can cause problems for astronauts, as they must bring their own oxygen supply or rely on specially designed spacesuits with built-in oxygen sources. Exposure to a vacuum can also cause bodily fluids to boil, which can be dangerous.

5. How does the lack of gravity affect an astronaut's bodily functions?

The lack of gravity in space can have various effects on an astronaut's body, including changes in blood circulation, muscle and bone loss, and a decrease in the body's production of red blood cells. It can also cause changes in vision, as the absence of gravity can cause a buildup of fluid in the head and eyes.

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