Line art drawing of a <a href="https://en.wikipedia.org/wiki/Block_and_tackle" class="extiw" title="w:Block and tackle">Block and tackle</a> system, with 2:1 <a href="https://en.wikipedia.org/wiki/mechanical_advantage" class="extiw" title="w:mechanical advantage">mechanical advantage</a>, rigged to disadvantage (ie the hauling part changes direction <i>in</i> but does not affect the movement <i>of</i> the block from where it emerges).
<a href="https://en.wikipedia.org/wiki/Pearson_Scott_Foresman" class="extiw" title="en:Pearson Scott Foresman">Pearson Scott Foresman</a>
Archives of <a href="https://en.wikipedia.org/wiki/Pearson_Scott_Foresman" class="extiw" title="en:Pearson Scott Foresman">Pearson Scott Foresman</a>, donated to the <a href="https://en.wikipedia.org/wiki/Wikimedia_Foundation" class="extiw" title="en:Wikimedia Foundation">Wikimedia Foundation</a>