Multiple Choice Questions 1. The pole supports a 22-lb traffic light. Using Cartesian vectors, determine the moment of the weight of the traffic light about the base of the pole at A. A) MA = (- 132i + 229j) Ib-ft B) MA = (- 132i - 229j – 216k) Ib-ft C) MA = 216k Ib-ft D) MA = (- 229i + 132j) Ib-ft 2. Determine the magnitude and direction of the couple moment. 120 lb 6t 120 lb A) M = 3120 lb - ft CW B) M = 2496 Ib - ft CW C) M = 3900 lb ft CW D) M = 2496 Ib · ft CCW %3!

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ENGR 2301
CH 4 Exam Review Problems
Multiple Choice Questions
1. The pole supports a 22-lb traffic light. Using Cartesian vectors, determine the moment of the
weight of the traffic light about the base of the pole at A.
A) MA = (- 132i + 229j) Ib-ft
B) MA = (- 132i – 229j – 216k) Ib-ft
C) MA = 216k Ib-ft
D) MA = (- 229i + 132j) Ib-ft
2. Determine the magnitude and direction of the couple moment.
120 lb
8ft
6t, 6ft
6 ft
120 lb
A) M = 3120 Ib · ft CW
B) M = 2496 Ib - ft CW
C) M = 3900 Ib · ft CW
D) M = 2496 Ib · ft CCW
3. Determine the magnitude and direction of the moment of the force if the force at A about point P.
260 N
A) Mp = 600 Nm n
B) Mp = 600 Nm
C) Mp = 1440 Nm
D) Mp = 1440 Nm n
1
Transcribed Image Text:ENGR 2301 CH 4 Exam Review Problems Multiple Choice Questions 1. The pole supports a 22-lb traffic light. Using Cartesian vectors, determine the moment of the weight of the traffic light about the base of the pole at A. A) MA = (- 132i + 229j) Ib-ft B) MA = (- 132i – 229j – 216k) Ib-ft C) MA = 216k Ib-ft D) MA = (- 229i + 132j) Ib-ft 2. Determine the magnitude and direction of the couple moment. 120 lb 8ft 6t, 6ft 6 ft 120 lb A) M = 3120 Ib · ft CW B) M = 2496 Ib - ft CW C) M = 3900 Ib · ft CW D) M = 2496 Ib · ft CCW 3. Determine the magnitude and direction of the moment of the force if the force at A about point P. 260 N A) Mp = 600 Nm n B) Mp = 600 Nm C) Mp = 1440 Nm D) Mp = 1440 Nm n 1
ENGR 2301
4. Determine the moment of the force about point O.
1m
2 m
500 N
A) 600N-m counterclockwise
B) 600N-m clockwise
C) 200N·m counterclockwise
D) 200N-m clockwise
5. The force F is acting along DC. Using the triple scalar product to determine the moment of F about
the bar BA, you could use any of the following position vectors except
2.5m
A) rBC
C) rac
B) rAD
D) rDB
E) rBD
6. Determine the resultant moment of the forces acting about the x, y, z axes.
100 N
i 50 N
200 N
300 N
A) Mx= 300 N-m, My= 400 N·m, M2= 600 N•m
B) Mx= -300 N-m, My= -400 N-m, M2= -600 N-m
C) Mx= -600 N•m, My= -400 N-m, M;= 300 N-m
D) Mx= 300 N-m, My= 600 N-m, M,= -400 N-m
7. The original force and couple system and an equivalent force-couple system have the same
effect on a body.
A) internal
B) external
C) internal and external
D) microscopic
Transcribed Image Text:ENGR 2301 4. Determine the moment of the force about point O. 1m 2 m 500 N A) 600N-m counterclockwise B) 600N-m clockwise C) 200N·m counterclockwise D) 200N-m clockwise 5. The force F is acting along DC. Using the triple scalar product to determine the moment of F about the bar BA, you could use any of the following position vectors except 2.5m A) rBC C) rac B) rAD D) rDB E) rBD 6. Determine the resultant moment of the forces acting about the x, y, z axes. 100 N i 50 N 200 N 300 N A) Mx= 300 N-m, My= 400 N·m, M2= 600 N•m B) Mx= -300 N-m, My= -400 N-m, M2= -600 N-m C) Mx= -600 N•m, My= -400 N-m, M;= 300 N-m D) Mx= 300 N-m, My= 600 N-m, M,= -400 N-m 7. The original force and couple system and an equivalent force-couple system have the same effect on a body. A) internal B) external C) internal and external D) microscopic
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