Is the force of gravity affected by an object's mass?

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The discussion revolves around misconceptions about gravity, particularly in relation to the Moon, sparked by a philosophy TA's apparent misunderstanding of basic physics. Participants express disbelief that a college-level educator could make such an error, emphasizing that all objects with mass exert gravitational force, including on the Moon. A series of hypothetical physics questions are posed, highlighting the confusion surrounding gravitational concepts and the importance of basic scientific literacy.The conversation also touches on the quality of science education in the U.S., with some arguing that mandatory science education often ends after 9th grade, leading to gaps in knowledge among college students. Participants share anecdotes about testing students' understanding of gravity and related concepts, revealing a concerning level of scientific ignorance. The need for a foundational understanding of physics is emphasized, as well as the potential for developing a questionnaire to assess scientific knowledge across various disciplines. Overall, the thread underscores the significance of basic scientific education and the implications of widespread misconceptions in society.
  • #101
ideasrule said:
Um, it is the case. If Earth were more massive, it would pull on objects with more force.

I meant the smaller objects. It would seem intuitively like since they have mass, that would produce some gravity which should slightly affect their attraction to the larger object. I know Newton's laws say this isn't the case. I was wondering why.
 
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  • #102
Galteeth said:
I meant the smaller objects. It would seem intuitively like since they have mass, that would produce some gravity which should slightly affect their attraction to the larger object. I know Newton's laws say this isn't the case. I was wondering why.

No, Newton's laws don't say this isn't the case. The force of gravity is directly proportional to an object's mass. An object's inertia, it's ability to resist that force, is also directly proportional to its mass.

You're mixing "attraction", which implies the strength of the force, and "acceleration" which is what's left over once you account for an object's ability to resist the force of gravity.
 

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