Question

A uniform ladder of length is placed against the wall as shown in the figure. If coefficient of friction is the same for both the walls, what is the minimum value of for it not to slip ?

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A

B

C

D

Hard

Solution

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Correct option is C)

: Draw the FBD
:
Given length of ladder is 5m. It is placed against the wall. Coefficient of friction is .
Let mass of the ladder is .
From the figure: for the vertical equilibrium  
For horizontal equilibrium     
The torque about point A is given by:
, since
   
\textbf{Step 2}$$:
From equation and
So,
Thus option C is correct.





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Solve any question of Laws of Motion with:-

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