Forces on Moon: Weight, Normal Force

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The discussion revolves around the forces acting on an object at rest on the Moon, specifically focusing on weight and normal force in a gravitational context. Participants explore the differences in gravitational effects compared to Earth.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants discuss the presence of weight and normal force on the Moon, questioning how these forces compare to those on Earth. There is uncertainty about the force exerted by an astronaut at rest and whether it would be zero.

Discussion Status

The conversation is ongoing, with some participants providing insights about the gravitational differences between the Moon and Earth. There is a recognition of the weight acting on the astronaut, but no consensus on the implications of being at rest.

Contextual Notes

Participants are considering the effects of reduced gravity on the Moon, noting that 'g' is approximately 1/6 of that on Earth. There is an emphasis on neglecting air effects in the discussion.

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If you were sitting at rest on the moon, what forces would be present?

I know that there is a weight force, and maybe a normal force...
Thank you
 
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Exactly the same forces as sitting on the Earth (neglecting air effects) - except with less gravity.
 
How much force does an 50 kg astronaut exert while sitting at rest?

I would assume 0 N since he is not moving but I'm not too certain...
 
He still has weight acting downwards.
Remember don't think about space and astronauts - he is a mass sitting on a planet, just one with a smaller 'g' there is nothing different about space.

'g' for the moon depends on both the smaller mass of the moon and it's smaller diameter - it's roughly 1/6 the value on earth.
 

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