simple machines for complex problems
June 29, 2007 12:15 PM Subscribe
Help me help a friend lift heavy things using pulleys and a ramp.
posted by zem to home & garden (13 answers total)
A friend owns an old garage/shop that features a 30 degree ramp the goes from one level to another. He would like to lift heavy things up said ramp using pulleys. While we're both familiar with the idea of pulleys, the actual practical application eludes us. For example, does pulley diameter matter? Will the rope used need to be able to hold the total weight of the object or some fraction of the weight depending on the number of pulleys? Is there a website or other resource that a physics novice could use to work out different pulley/weight scenarios?
While I've found lots of elementary school experiment-type information, I'm really looking for something more practical.
Any guidance would be greatly appreciated. Thanks!