1.1 Tell which of the following quantities is not a vector: (a) force, (b) momentum, (c) accelera- tion, (d) work, (e) weight. 1.2 Which of the following is not a scalar field? (a) Displacement of a mosquito in space (b) Light intensity in a drawing room (c) Temperature distribution in your classroom (d) Atmospheric pressure in a given region (e) Humidity of a city 1.3 Of the rectangular coordinate systems shown in Figure 1.13, which are not right handed? 1.4 Which of these is correct? = (a) AXA |A|2 (b) A X B + B XA=0 (c) A B C B.C.A (d) a, aya, (e) axaxay where a, is a unit vector ak 1.5 Which of the following identities is not valid? (a) a(b + c) =ab+bc (b) ax (b+c) axb+axc (c) a b = ba (d) c (a x b)-b- (axc) (e) aд a cos AB 1.6. Which of the following statements are meaningless? (a) A B+2A = 0 (b) A B+5= 2A - => (c) A(A+B)+2=0 (d) A A+B B=0 1.7 Let F2a, 6a, + 10a, and Ga, + Ga, + 5a,. If F and G have the same w vector, G, is (a) 6 (c) 0 (b) -3 (d) 6 1.8 Given that A =a, + aa, + a, and B = +a,+ a,, if A and B are normal to other, a is (a) -2 (d) 1 (b) -1/2 (e) 2 (c) 0 1.9 The component of 6a, + 2a, 3a, along 3a, - 4a, is (a) -12a,-9a, - 3a, (b) 30a-40a, (c) 10/7 (d) 2 (e) 10 1.8 Given that Aa, + aa, + a, and B = aa, + other, a is (a) -2 (b) -1/2 (c) 0 (d) 1 (e) 2 +a,, if A and B are normal to each - 1.9 The component of 6a, + 2a, 3a, along 3a,4a, is (a) -12a, -9a, - 3a, (b) 30a, -40ay (c) 10/7 (d) 2 (e) 10 با آب بر (d) (a) (b) (c) FIGURE 1.13 For Review Question 1.3. 1.10 Given A-6a, + 3a, + 2a,, the projection of A along a, is (a) -12. (b) -4 (d) 7 (e) 12 (c) 3 (f)