It a
It actually doesn't matter if I take clockwise as positive or not, because I let the sum of all the moments about point B equal to zero, thus implying that the sum of the clockwise moments are equal to the sum of the anti-clockwise moments about B. The right hand rule is relative to...
I think I made a mistake because the original answer was a negative value. In a second post I typed out why I thought I was wrong, but I suppose it didn't go through. I apologise for this. As for the Reaction forces, "Reaction Force" is another name for normal force.
It was stated that the ladder is "at the point of slipping" which is another way of saying that the system is in equilibrium. This is why I let the sum of the moments equal to zero.
Thank you for your response! Unfortunately I'm going to have to tell you that my lecturer hasn't introduced me to the concept of Newton's 2nd Law of Rotation yet, so this problem has to be attempted solely by forces and moments. I will however do research into the 2nd Law of rotation and apply...
Homework Statement
A ladder 8m long weighing 200N is resting against a rough vertical wall. A man of 720N climbs the ladder at point M. Take the coefficient of friction for both surfaces to be 0.25.
The top of the ladder is point A and the bottom is B. The ladder makes an angle of 30 degress...