Question

A ladder AB has mass M and length 6a.

The end A of the ladder is on rough horizontal ground.


The ladder rests against a fixed smooth horizontal rail at the point C.


The point C is at a vertical height 4a above the ground.


The vertical plane containing AB is perpendicular to the rail.


The ladder is inclined to the horizontal at an angle a, where sin a= 4/5,, as shown in Figure 1.


The coefficient of friction between the ladder and the ground is u.


The ladder rests in limiting equilibrium.


The ladder is modelled as a uniform rod.


Using the model,


(a) show that the magnitude of the force exerted on the ladder by the rail at C is 9Mg/25


(6) Hence, or otherwise, find the value of mu.

Answer 1

Answer:

sorry bro I do not know

Step-by-step explanation:

It is too big not able to solve

good night