- #1
martinlematre
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Homework Statement
A uniform 15kg ladder whose length is 5.0 m stands on the floor and leans against a vertical wall,
making an angle of 25 with the vertical. Assuming that the friction between the ladder and the wall
is negligible, what is the minimum amount of friction between the ladder and the floor which will
keep the ladder from slipping.
(34 N)
Homework Equations
torque = fperp * distanceThe Attempt at a Solution
I keep on writing stuff but never get the right answer (which is 1/2 tan theta * mg)
i have no idea how to get there. i keep mapping and drawing FBD and i can't get there... i think its my understanding of torque and not understanding where the pivot point on this ladder is...
anyone care to share