simple manual fender

invalid@example.com (odisseo 18), odisseo 18
Tue, 12 Jul 2016 08:04:59 +0000
naval

How much weight could a man with a hoist made up of a rope and a carrucola? I found the formula in physics= f driving force, q strength resistant k advantage; k=q/f = >1; q strength resistant should be the load to lift,