where's the extra distance when using a pulley? or gear..
2007-05-23 00:31:27 · 4 answers · asked by Lana S 2 in Science & Mathematics ➔ Geography
It's a ratio, the inverse of the "mechanical advantage."
2007-05-23 00:34:06 · answer #1 · answered by Anonymous · 0⤊ 1⤋
Using a pulley won't necessarily give extra distance. A pulley will increase load lifting strength.
Gears can increase load strength and can increase or decrease distance depending upon gear ratio.
2007-05-23 00:36:40 · answer #2 · answered by Mark S 3 · 0⤊ 1⤋
OK, you'll need to visualize this since I can't draw it out, but imagine a one loop pulley, one with a mechanical advanage of 2. The load is supported by two pieces of rope and you start to pull. To raise the load an inch, you need to pull out TWO inches, because you need to shorten BOTH supporting pieces of rope by one inch. As for gears, the comparison is in their circumference. Just think of a small gear hooked up to a big one. You have to rotate the little one a bunch to get the big one to rotate once.
2007-05-23 01:29:57 · answer #3 · answered by supastremph 6 · 0⤊ 0⤋
i know what i'd like to say but i'll shut up here instead,'' ha.''
2007-05-26 22:57:33 · answer #4 · answered by kay kay 7 · 0⤊ 0⤋