Newton's Laws of Motion

  • Thread starter azizlwl
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  • #1
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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 [Broken]
 
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  • #2
tiny-tim
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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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