A 100lb vertical force is applied to the end of a lever that is attached to a shaft (not shown) at O .

Determine 

a) the moment about O, 

b) the horizontal force at A that creates the same moment, 

c) the smallest force at A that produces the same moment, 

d) the location for a 240lb vertical force to produce the same moment, 

e) whether any of the forces from b, c, and d is equivalent to the original force
  

24 in. 100 Ib 60 Of