question archive a dock worker uses a pulley system to raise a boat onto a dock
a dock worker uses a pulley system to raise a boat onto a dock
Subject:BiologyPrice: Bought3
a dock worker uses a pulley system to raise a boat onto a dock. the pulley system has a mechanical efficiency of 73%. the boat has a weight of 950 N. the pulley system lifts the boat 5 m into the air. how many Newton-meters of work does the dock worker have to exert to lift the boat?
