How much does it weigh now?
December 21, 2010 10:45 AM Subscribe
A 600-pound, 24-foot-long retractable movie screen is suspended from two chains attached to an overhead pipe. I want to get it down. Come inside for the details.
posted by goatdog to Science & Nature (17 answers total) 1 user marked this as a favorite
The chains attach one foot from either end of the screen. I want to lower one end of the screen at a time by attaching a rope to that end of the screen, throwing the rope over the overhead pipe, and slowly letting out the rope until that end is on the ground. Then I'll repeat. How much weight is that rope going to have to hold at any given time? Is it safe to assume 300 pounds at first, and then steadily less? I should have paid more attention in my math classes. (This is sort of academic, as we're going to use a rope that can support the entire weight, but I'm curious about how this works.)