Question

A uniform rod of length  rests against a smooth wall as shown in figure. Find the friction coefficient between the ground and the lower end if the minimum angle that the rod can make with the horizontal is .

760711
expand
A

B

C

D

Hard

Solution

verified
Verified by Toppr
Correct option is D)

Figure(b) gives the forces .
Reactional force on rod by ground
Reactional force on rod by wall
frictional force
is the maximum angle the rod can make with horizontal.
Equating the forces on verticle direction we get 
Equating the forces on horizontal direction we get 
Now the torque about point B should be balanced 
So,
And

solution
expand
Solve any question of Laws of Motion with:-

Was this answer helpful?

upvote 0
downvote0