3. Show the solution: (a) Calculate the moment of the 90-N force about point o for the condition - 15. Also, determine the value of 0 for which the moment about Ois (6) zero and (e) a maximum Ans.(a) M - 33.5 N·m CCW (b) 0 - 36.99 (or 217") (e) 0 - 126,99 (or 307") 0 F90 N 800 mm A 600 mm 4. A prybar is used to remove a nail as shown. Determine the moment of the 240 N force about the point of contact between the prybar and the small support block. 240 N 350 mm 65 30 mm 5. Calculate the moment of the 250 N force on the handle of the monkey wrench about the center of the bolt. 250 N 15 200 mm 10 mm