A multipurpose utility tool grips a cotter pin at A while 15-lb forces are applied to the handles (Figure P4.27).

(a) Complete the free body diagram of the combined upper jaw and lower handle assembly, which has been only partially drawn.

(b) Calculate the force acting at A.

(c) Alternatively, how much greater would the force be if the pin was being cut at B?

Figure P4.27

14 in. 4 in. 15 lb - in. A B C D 15 lb 15 lb