1. READING QUIZ The resultant force of a given couple system is always _______. A) positive B) negative C) zero D) None of the above.

2. READING QUIZ Moment of a couple is considered as a ______ vector. A) sliding B) free C) zero D) None of the above.

3. CONCEPT QUIZ The moment vector of a couple is called a “free vector” because _________. A) it does not have a fixed direction B) it does not have a magnitude C) its magnitude is the same about all points D) it has zero magnitude

4. CONCEPT QUIZ Which of the following systems are equivalent ? A) A  B B) A  C C) B  C D) C  D z F y x F 2d F z F x y d z d x F y z 2F y x d d d A BC D

5. ATTENTION QUIZ The moment vector of the couple forces shown is A) 2 Fd j B) –2 Fd j C) 2 Fd k D) Fd i F F 2d d x z y

6. ATTENTION QUIZ The moment of a couple is determined as r  F, where r is the position vector from __. A) O to P B) O to Q C) P to Q D) Q to P y - F F x z O Q P