Understanding Newton's Laws of Motion: Solving a Tricky Equation with Blocks

AI Thread Summary
The discussion revolves around understanding the equation x2 + l = x1 + (l/16) in the context of Newton's Laws of Motion, specifically when one-fourth of block 1 is on block 2. Participants are trying to derive the equation and clarify the reasoning behind the lengths on both sides. It is noted that x1 and x2 represent the distances moved by blocks 1 and 2, respectively. A key point is that block 1 must overtake block 2 by a distance of (15/16)l. The conversation highlights the complexities involved in applying Newton's principles to this scenario.
azizlwl
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At the instant that one-fourth of block 1 remains on block 2, x2+l=x1+(l/16).

For days trying to figure out how this equation derived from.
Thank You.

http://img15.imageshack.us/img15/3926/kotak.jpg
 
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azizlwl said:
At the instant that one-fourth of block 1 remains on block 2, x2+l = x1+(l/16).

hi azizlwl! :smile:

(i don't understand why they've put lengths on both sides of the equation, but …)

x1 and x2 are the distances blocks 1 and 2 have moved

since block 1 has to overtake block 2 by (15/16)l, that means x1 - x2 = (15/16)l :wink:
 

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