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Question

A 400 N hatch is located at the upper end of a stairway. Determine the total upward force a person standing on the staircase must apply to initiate door opening and the net force applied on the hatch by the hinges. Take the upward force to be applied midway of the edge opposite to the hinges.

Accepted Answer

F_up = 200 N; F_hinge = 200 N

Answer

F_up = 200 N; F_hinge = 400 N

Answer

F_up = 0 N; F_hinge = 400 N

Answer

F_up = 0 N; F_hinge = 200 N

Answer

F_up = 200 N; F_hinge = 0 N

Answer

F_up = 400 N; F_hinge = 0 N

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A 400 N hatch is located at the upper end of a stairway. Determine the total upward force a person standing on the staircase must apply to initiate door opening and the net force applied on the hatch by the hinges. Take the upward force to be applied midway of the edge opposite to the hinges.