Hi , please help me to understand how to set up the equation for the torques.(adsbygoogle = window.adsbygoogle || []).push({});

This is the context:

A ladder of length=0.l=5m and weigth w_{ladder}=160N rest against a wall. its lower end is at 3m from the wall.

A man weigthing 740N climbs 1 m along the ladder.

N_{wall}is the reaction ladder-wall.

(counterclock wise direction is considered positive)

The equation of the torque (equilibrium) about the bottom of the ladder is:

N_{wall}*4 -160* 1.5-740*1*(3/5).

I dont know how they get the equation especially the underlined coefficients.

My problem is that I dont know which distance to consider when computing for the torque in this case: the distance in respect to x axis, y axis or along the ladder.

I hope I was clear enough

Thank you

B

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# Homework Help: Help to understand

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