Problem 8 For each case illustrated in Fig. 4-4, determine the moment of the force about point O. -2 m (b) 3 ft (d) 0.75 m 4 ft 50 N 1 ft 45 1 sin 45 ft 60 lb 4 m Fig. 4-4 2ft 3040 lb (c) 2 cos 30° ft 1 m 7kN 2 m (a) 100 N

Determine the x-, y-component of force Fa, then calculate the total moment about the point A. ww.w 9. F1=2.05 kN F3=2.30 kN F=2.84 kN 49° 2.00 m B. 4.00 m 6.94 -6.94 1. Fx kN 1.51 2. Fa KN -6.58 3. M kNm 4. Not an answer -1.508 +1.735

A 444-N force is applied at A as shown. y = 207 mm. Determine (a) the moment of the 444-N force about D in N-m. Write numerical value and 2 decimal places. + for counterclockwise y mm. 25° P 100 mm- D 200 mm- 125 mm B

B2

100 mm to 250 mm If the moment of the force P and the tension B pin P=400N 70 Tco about the is equal to Zero. Find the tension Teo. TCD Ane Tco = 183-5 N. %3D 25

Q1: Determine the Moment of the Force 800N shown in Fig. about point o By at least 3 ways. 875 mm- 625 mm F= 800 N +玲哈 玲:

The member shown below is fixed at O and its dimensions are h1 = 1.10 mm, h2 = 0.20 mm, and w = 0.50 mm.     A force F of magnitude F=14N is applied at point B.   Determine the magnitude of the moment of the force about point O

2/31: Determine the moment of the 50-N force (a) about point O and (b) about point C. Ans. Mo 519 N.mm CCW, Me 1616 KN mm mm C(0, 25) B 40, 101 x, mm F=50 N A(-15,-20)

Assuming: moment counter clockwise is positive Determine the moment of H.W3 the force about point O. 3 ft 1 ft 45° 1 sin 45° ft 60 lb

Compute the combined moment of the two 75-lb forces about (a) point O and (b) point A. The moment is positive if counterclockwise, negative if clockwise. Assume a = 8.2 in., b = 3.9 in., F = 75 lb. y | I F Answers: (a) Mo= (b) MA= i i b F lb-in. lb-in.