Satellite - resistance (retarding force)

[charlie05]

Homework Statement

What is the average resistance force F acting on the satellite during its flight, m = 3000kg, h=300km.

Homework Equations

The Attempt at a Solution

If it is llow orbit, so it inhibits the resistance of the atmosphere. In 300 km is no air, so no resistance ...?

 

[BvU]

What equation are you using to calculate air pressure at 300 km ?

 

[charlie05]

?

 

[charlie05]

p0 = 101 325 Pa
h= 300 000m
g=9,81 m/s2
ρ 0 = 1,225 kg/m3

 

[charlie05]

p 300 000 = 101 325*e-35,58 Pa

 

[BvU]

https://www.avs.org/AVS/files/c7/c7edaedb-95b2-438f-adfb-36de54f87b9e.pdf

 

[BvU]

Agree it isn't much. What is the question (the full problem statement) ?

 

[charlie05]

Yes I agree. Therefore, I think that is a resistive force is zero.

 

[BvU]

What is the question (the full problem statement) ?

According to your terse problem statement they ask for the average reisistance during its flight.
If its flight is circling the Earth for 30 years it might be relevant to come up with a non-zero number.
But if its flight is a launch from sea level all the way up to 300 km I suppose you can ignore the pressure up there.

That's why I asked for the full problem statement

 

[charlie05]

I understand. I have to ask my teacher. Yet I thank you for the effort and help.