posted by Anonymous on .
The Ladder is 5 m long and weighs 180N. The guy weighs 800N, and stops 1m horizontally up the ladder. The bottom of the ladder rest on a horizontal stone ledge at 53.1 degree.
Find the normal and he frictional force at the base.
draw the figure.
lable the forces. At the top of the ladder, you have a horizontal force only pushing intothe wall, and the wall pushing back.
You have on the ladder at center, weight, and the guy 1 m upwards,
You have the base of the ladder, vertical, and friction force.
Now write equilibirum equations.
Sume horizontal forces=0
sum vertical forces =0
sum moment about any point (I recommend the base of the ladder)=0
You will get a solution quickly.