Asked by DW
An 8.5 m ladder whose weight is 310 N is placed against a smooth vertical wall. A person whose weight is 515 N stands on the ladder a distance 1.8 m up the ladder. The foot of the ladder rests on the floor 5.78 m from the wall.
Calculate the normal force exerted by the floor on the ladder.
Answer in units of N
Calculate the normal force exerted by the floor on the ladder.
Answer in units of N
Answers
Answered by
Damon
The only vertical force on the person-ladder system is the force up from the floor.
Therefore this vertical force up must balance the weight of the person plus the ladder.
Fup = 310 + 515 = 825 N
Now if you asked for the HORIZONTAL force from the wall on the ladder, then we would have had to do moments.
Therefore this vertical force up must balance the weight of the person plus the ladder.
Fup = 310 + 515 = 825 N
Now if you asked for the HORIZONTAL force from the wall on the ladder, then we would have had to do moments.
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