An 85-kg person stands on a lightweight ladder, as shown in the figure (Figure 1

Question

An 85-kg person stands on a lightweight ladder, as shown in the figure (Figure 1). The floor is rough; hence, it exerts both a normal force f_1, and a frictional force f_2, on the ladder. The wall, on the other hand, is frictionless; it exerts only a normal Suppose the person climbs higher on the ladder. As a result, is the ladder more likely, less likely, or equally likely to slip? more likely less likely equal likely Choose the best explanation from among the following: The magnitude of f_2 must increase as the person moves upward. The forces are the same regardless of the person's position. When the person is higher, the ladder presses down harder on the floor.

Explanation / Answer

Here from the figure,

the ladder is massless, so the only vertical force acting on the system is the force applied by the person.

Now, since the system is in equilibrim it means the two horizontal forces are equal .

F3 = F2 its because the person is in the centre of gravity of the ladder. Hence, if the person moves upward the centre of gravity changes. and the force will be greater on the F2 side.

PART A:

Answer :- more likely

PART B:

Answer :- The magnitude of F2 must increase as the person moves upward.

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