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Posted by on Monday, January 10, 2011 at 10:00pm.

A construction worker attempts to lift a uniform beam off the floor and raise it to a vertical position. The beam is 2.50m long and weighs 500N. At a certain instant the worker holds the beam momentarily at rest with one end at distance d=1.50m above the floor by exerting a force P on the beam, perpendicular to the beam. What is the magnitude P?

  • physics - , Monday, January 10, 2011 at 10:17pm

    It depends on where he is holding the beam, you did not state that.

  • physics - , Monday, January 10, 2011 at 10:19pm

    He's pushing on it at the end that's not on the floor.

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