AL 87 MC mechanics [複製鏈接]

Galneryus

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電梯直達

樓主

發表於 2008-11-7 19:24:04 |只看該作者 |倒序瀏覽

AL 87 MC mechanics

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an object of mass 3kg is tied to another object of mass 2 kg with a string passing over a fixed smooth pulley. The weight of the pulley is negligible. When the object move under the action of gravity, the vertical upward force acting on the acle of the pulley

[img=http://img443.imageshack.us/img443/393/165uy5.th.png]][img=http://img443.imageshack.us/images/thpix.gif]

how to calc. it?
the ans is 48N

[ 本帖最後由 sameki 於 2008-11-8 17:33 編輯 ]