1. READING QUIZ Select the number of reactions created by a 3-D rigid body’s fixed support. A)2 B)3 C)6 D)None of the above

2. READING QUIZ If a 3-D rigid body has eight support reactions or unknowns acting on it, it has ___________ redundant reactions. A)two B)three C)five D)eight

3. CONCEPT QUIZ A rectangular plate of mass m is to be held in equilibrium by cables. Select the configuration that creates a statically determinate design. m m m m (A) (B) (C) (D)

4. CONCEPT QUIZ Three bars are welded together and supported by three frictionless eyebolts at A, B, and C. Each eyebolt generates two force reactions. In this case, B X equals ______. A)A Z B)3 C Z C)2 A X D)P E)None of the above. C A B 3a 2 a X Y Z P a

5. CONCEPT QUIZ A tripod has a force acting on it in the negative y direction. Select the false statement. A)F AD = F CD B)F CD is tensile C)F AD is compressive D)F BD is tensile y x A 3 m 4 m 3 m 4 m z D F C B

6. ATTENTION QUIZ A rectangular plate of mass m is held in equilibrium by vertical cable(s). Theoretically, what is the minimum number of cables required? A)1 B)2 C)3 D)4 E)6 Y ZX

7. ATTENTION QUIZ 7. The rod AB has a vertical force F acting on it and is supported by ball-and-sockets joints at A and B. Select the true statement. A)Reaction at B is 200 j lb B)Moment about the line AB is not zero. C)Problem is indeterminate. D)The 3 force reactions are redundant. x y B C A 3 ft4.5 ft F = 400 N 6 ft z