Sean and Greg are on a job site standing on two beams 11.0 ft apart. They need to lift their crate of tools midway between them with ropes up 33.5 ft to where they are working.
(a) What is the angle between the ropes when the crate is on the ground?
(b) How much force do Sean and Greg need to exert on the ropes when lifting the 115-lb crate off the ground?
(c) How much force do both Sean and Greg need to exert when the crate is 5.75 ft below them?
(d) Explain why the force to lift the crate changes as it moves closer to them.