# Newton's Principia Problem

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1. Jan 9, 2015

### Solomon Chang

Furthermore, is there any way of understanding the Principia in a more numerical ways rather than words like this? Just asking.
Again, thank you very much.

2. Jan 10, 2015

### Doug Huffman

S. Chandrasekhar Newton's Principia for the Common Reader Chapter 3, Section 15, pp 50-52 in modern integral notation.

3. Jan 10, 2015

### Philip Wood

I think that in modern terms, this is $s = \frac{1}{2} a t^2$. So $\frac{s_1}{s_2} = (\frac{t_1}{t_2})^2$. This is constant acceleration from rest. Since it's at the very beginning off the motion, the force won't have had time to change?

Last edited: Jan 10, 2015
4. Jan 10, 2015

### Stephen Tashi

It would interesting to know whether Newton is representing a graph of a function of position vs time with time on the y-axis or whether he is thinking of the curves as trajectories of an object in 2-D space.

5. Jan 10, 2015

### Solomon Chang

Wao, thank you everyone, this helps much

6. Jan 11, 2015

### Staff: Mentor

Last edited by a moderator: May 7, 2017