#### Minou14

1. I have to calculate the weight of an astronaut, whose mass is 72 Kg on the surface of different planets, but in the table telling me the Acceleration due to gravity (or Gravitational Field Strength) it there is also a column about whether the planet has an atmosphere. Is that relevant?

2. Homework Equations - Weight (N) = Mass (Kg) X Acceleration (M/s2)

3. I need to know if the atmosphere thing is relevant? I am ignoring it so far!

Thank You so Much!

Related Introductory Physics Homework Help News on Phys.org

#### Minou14

I am sorry i meant the equation was W = M x G.F.S (N/kg) thank you!

#### gneill

Mentor
Hi Minou14, Welcome to Physics Forums.

Whether or not the planet has an atmosphere should not be relevant for your calculations.

Exceptions would be where the planet's atmosphere is so dense that it provides significant buoyancy for the astronaut. Maybe at the bottom of the atmosphere of a gas giant you'd want to add that contribution to the weight experienced.

If in doubt, post your list of planets.

#### Minou14

Thank you so much! That is really help full and yes sorry about the title - I was in a rush! :)

### Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving