Flag Mechanics> In Sample Problem 9-7, if the wall were n...
question mark

In Sample Problem 9-7, if the wall were not frictionless, would the empirical laws of friction supply us with the extra condition needed to determine the extra (vertical) force exerted by the wall on the ladder?

Simran Bhatia , 9 Years ago
Grade 11
anser 1 Answers
Jitender Pal

Last Activity: 9 Years ago


The figure below shows the forces acting on the ladder held against the wall.

235-1413_1.PNG
If there is friction between the wall and the ladder, the vertical equilibrium of the ladder can be represented as:
235-2485_1.PNG
Here f1 is the frictional force between the wall and the ladder, M is the mass of the firefighter, m is the mass of the ladder, g is the acceleration due to gravity and N is the normal force on ladder from ground.
Therefore one can see that the normal force exerted by the ground on the ladder reduces by the amount equal to the magnitude of frictional force between the wall and the ladder.
Also the empirical law for the friction is
235-145_1.PNG

Provide a better Answer & Earn Cool Goodies

Enter text here...
star
LIVE ONLINE CLASSES

Prepraring for the competition made easy just by live online class.

tv

Full Live Access

material

Study Material

removal

Live Doubts Solving

assignment

Daily Class Assignments


Ask a Doubt

Get your questions answered by the expert for free

Enter text here...