A problem by dwijendra senapati
Level
3
A 17-kg ladder has a center of mass at G. If the coefficients of friction at A and B are m= 0.3 and n = 0.2, respectively, determine the smallest horizontal force that the man must exert of the ladder at point C in order to push the ladder forward.
The answer is 204.
This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try
refreshing the page, (b) enabling javascript if it is disabled on your browser and,
finally, (c)
loading the
non-javascript version of this page
. We're sorry about the hassle.
1 solution
Apply the frictional forces at points A and B, the normal reactions at A and B. Write the conditions of equilibirium.
But take the moments about the centre of gravity of ladder, you will get afterwards the required force P.