Sociology homework help

Sociology homework help. 3. 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-metres   of   work   does   the   dock   worker have   to   exert   to   lift   the   boat?

Sociology homework help

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