Suppose the person in Example 11-11 climbs higher on the ladder.

(a) As a result, is the ladder more likely, less likely, or equally likely to slip?

(b) Choose the best explanation from among the following:

I. The forces are the same regardless of the person's position.

II. The magnitude of Æ’2 must increase as the person moves upward.

III. When the person is higher, the ladder presses down harder on the floor.

a = 3.8 m mg Axis b = 0.70 m