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To lift a heavy crate, a man uses a block and tackle attached t... | Filo

to lift a heavy crate a man uses a block and tackle attached to the bottom of an i beam at hook b knowing that the moments about the y and the z axes of the force exerted at b by portion a b of the ro

WRS Amesbury Block & Tackle Balance for Non-Tilt Windows - 32" 3130 (16-23 lbs)