A 80.0 kg painter stands on a uniform 4.0 m long board of mass 10.0 kg supported horizontally by two ladders as in the diagram below. Find the forces exerted by each ladder on the board. Show workings.

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Q: 114 kN-m m

A: ∑MB=0 12×114×6×3-NA×45×6=0NA=213.75kN ∑MA=0By×6=12×114×6×3By=171kN

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Torque

Torque is the rotational equivalent of linear force in physics and mechanics. Based on the course of study, it is also known as the moment of force, rotational force, or turning effect.