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FIGURE 1 shows a uniform ladder PQ of weight 240 N leans on a smooth wall and resting on a rough floor with a minimum inclination angle θmin. The coefficient of friction between the ladder and floor is 0.25. (i) With the aid of a force diagram, calculate the forces acting on the ladder at point P and point Q.(ii) Determine the value of θmin.

FIGURE 1 shows a uniform ladder PQ of weight 240 N leans on a smooth wall and resting on a rough floor with a minimum inclination angle θmin The coefficient of class=

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The weight of the ladder is,

[tex]W=240\text{ N}[/tex]

The coefficient of friction is,

[tex]\mu=0.25[/tex]

The normal force on the ladder due to the floor is,

[tex]undefined[/tex]

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