What Is the Formula for the Acceleration of Two Bodies Towards Each Other?

AI Thread Summary
The discussion focuses on the formula for calculating the acceleration of two bodies moving towards each other, specifically referencing gravitational interactions like that of the sun and the earth. Participants emphasize the importance of understanding the relationship between force and acceleration, suggesting that the gravitational force formula is essential for this calculation. There is also a suggestion to look up gravitational force for more information. Additionally, the moderator offers to move the thread to a more appropriate category if it pertains to homework. The conversation highlights the foundational concepts of physics related to gravitational interactions.
Littlemin5
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Does anyone remember the formula used for finding the acceleration of two bodies towards each other, such as the sun towards the earth?
 
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Littlemin5 said:
Does anyone remember the formula used for finding the acceleration of two bodies towards each other, such as the sun towards the earth?

Sure. Force causes acceleration (remember the formula for that?). The force between two masses is another formula that is good to commit to memory. Google gravitational force, and click on the first hit.

Is this for homework? I can move the thread to Homework Help, Intro Physics.
 

Thread 'Derivation of Hamilton's Principle: Questions'

I have recently been really interested in the derivation of Hamiltons Principle. On my research I found that with the term ##m \cdot \frac{d}{dt} (\frac{dr}{dt} \cdot \delta r) = 0## (1) one may derivate ##\delta \int (T - V) dt = 0## (2). The derivation itself I understood quiet good, but what I don't understand is where the equation (1) came from, because in my research it was just given and not derived from anywhere. Does anybody know where (1) comes from or why from it the...
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