I am having problems with the following problem.(adsbygoogle = window.adsbygoogle || []).push({});

A person is standing on a leaning ladder rested on a wall, where m1 is the mass of the person and m2 is the mass of the ladder. He is up at the distance d on the ladder, L (the length). There is also an angle at the bottom.

The first part of the question asks to find the minimum coefficient friction, so that the ladder does not slip, which I found was 0.5*L*m_2*g+m_1*g*d)/(L*tan(theta)*(m_2*g+m_1*g))

Then, part B of the question is to find the magnitude of the force of friction that the floor applies to the ladder. The coefficient of the static friction force, mu_s is equal to (3/2)*mu_min which is given. In this case, I know that f doesn't equal mu_s*N. but it is less than mu_s*F_normal .

In the end, I got (3/2)*(d/L*m_1*g+0.5*m_2*g)*tan(theta) , which is completely wrong.

Any help is appreciated.

Thank you

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# Homework Help: Leaning ladder

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