Copyright © 2010 Pearson Education South Asia Pte Ltd QUIZ (Chapter 2) 1. Which one of the following is a scalar quantity? A) Force B) Position C) Mass D) Velocity 2. For vector addition, you have to use ______ law. A) Newton’s Second B) the arithmetic C) Pascal’s D) the parallelogram Copyright © 2010 Pearson Education South Asia Pte Ltd

Copyright © 2010 Pearson Education South Asia Pte Ltd QUIZ 3. Resolve F along x and y axes and write it in vector form. F = { ___________ } N A) 80 cos (30°) i – 80 sin (30°) j B) 80 sin (30°) i + 80 cos (30°) j C) 80 sin (30°) i – 80 cos (30°) j D) 80 cos (30°) i + 80 sin (30°) j 4. Determine the magnitude of the resultant (F1 + F2) force in N when F1={ 10i + 20j }N and F2={ 20i + 20j } N . A) 30 N B) 40 N C) 50 N D) 60 N E) 70 N 30° x y F = 80 N Copyright © 2010 Pearson Education South Asia Pte Ltd

Copyright © 2010 Pearson Education South Asia Pte Ltd QUIZ 5. Vector algebra, as we are going to use it, is based on a ___________ coordinate system. A) Euclidean B) Left-handed C) Greek D) Right-handed E) Egyptian 6. The symbols , , and  designate the __________ of a 3-D Cartesian vector. A) Unit vectors B) Coordinate direction angles C) Greek societies D) X, Y and Z components Copyright © 2010 Pearson Education South Asia Pte Ltd

Copyright © 2010 Pearson Education South Asia Pte Ltd QUIZ 7. If F = {10 i + 10 j + 10 k} N and G = {20 i + 20 j + 20 k } N, then F + G = { ____ } N A) 10 i + 10 j + 10 k B) 30 i + 20 j + 30 k C) – 10 i – 10 j – 10 k D) 30 i + 30 j + 30 k Copyright © 2010 Pearson Education South Asia Pte Ltd

Copyright © 2010 Pearson Education South Asia Pte Ltd QUIZ 8. A position vector, rPQ, is obtained by A) Coordinates of Q minus coordinates of P B) Coordinates of P minus coordinates of Q C) Coordinates of Q minus coordinates of the origin Coordinates of the origin minus coordinates of P 9. P and Q are two points in a 3-D space. How are the position vectors rPQ and rQP related? A) rPQ = rQP B) rPQ = - rQP C) rPQ = 1/rQP D) rPQ = 2 rQP Copyright © 2010 Pearson Education South Asia Pte Ltd

Copyright © 2010 Pearson Education South Asia Pte Ltd QUIZ 10. Two points in 3 – D space have coordinates of P (1, 2, 3) and Q (4, 5, 6) meters. The position vector rQP is given by A) {3 i + 3 j + 3 k} m B) {– 3 i – 3 j – 3 k} m C) {5 i + 7 j + 9 k} m D) {– 3 i + 3 j + 3 k} m E) {4 i + 5 j + 6 k} m Copyright © 2010 Pearson Education South Asia Pte Ltd

QUIZ (Chapter 4) 1. What is the moment of the 12 N force about point A (MA)? A) 3 N·m B) 36 N·m C) 12 N·m D) (12/3) N·m E) 7 N·m 2. The moment of force F about point O is defined as MO = ___________ . A) r x F B) F x r C) r • F D) r * F • A d = 3 m F = 12 N Copyright © 2010 Pearson Education South Asia Pte Ltd Copyright © 2010 Pearson Education South Asia Pte Ltd 7

QUIZ 3. If a force of magnitude F can be applied in 4 different 2-D configurations (P,Q,R, & S), select the cases resulting in the maximum and minimum torque values on the nut. (Max, Min). A) (Q, P) B) (R, S) C) (P, R) D) (Q, S) 4. If M = r  F, then what will be the value of M • r ? 0 B) 1 C) r2F D) None of the above. Copyright © 2010 Pearson Education South Asia Pte Ltd Copyright © 2010 Pearson Education South Asia Pte Ltd 8

QUIZ 5. Using the CounterClockWise direction as positive, the net moment of the two forces about point P is A) 10 N ·m B) 20 N ·m C) - 20 N ·m D) 40 N ·m E) - 40 N ·m 6. If r = { 5 j } m and F = { 10 k } N, the moment r x F equals { _______ } N·m. A) 50 i B) 50 j C) –50 i D) – 50 j E) 0 10 N 3 m P 2 m 5 N Copyright © 2010 Pearson Education South Asia Pte Ltd Copyright © 2010 Pearson Education South Asia Pte Ltd 9