math motestr

[lkhant773]

Quantities that have only ………. are called scalars.

1. A ……… has both magnitude and direction.
2. The change in position along a certain direction is called ……… .
3. Force is a ……… quantity.
4. Mass is a …….. quantity.
5. The combined effect of two (or) more vectors is called …….. .
6. The vector sum of two vectors is called ……… vector.
   18.The process of sub-dividing into two or more vectors is called ……… .
7. A vector can be represented by an ………. .
8. Vectors of ………. kinds may not be added.
9. Only vector quantities of ………. kind may be added.
10. If D ⃗ =-4C ⃗, the magnitude of D ⃗ is ………. than that of C ⃗.
11. If A ⃗, B ⃗ and C ⃗ satisfy the equation A ⃗+B ⃗-C ⃗=0, then C ⃗ is ……… vector of A ⃗and B ⃗.
12. The magnitude of the resultant force of a 12 N pointing east and a force of 5 N pointing
    south is ……….. N.
13. A vector of magnitude 100 units is inclined at angle 45° to the X-
    3:8 and b:c=4:5, then a:c=…………..
    A. 5:11 B. 3:8 C. 3:11 D. 3:10 E. 5:8
14. If a:b=3:5 and b:c=3:5, then a:b:c=………
    A. 2:3:5 B.3:5:7 C.6:10:15 D. 9:15:25 E.9:20:27
15. If a:b = 5:3 , then 3a+ 4b: 4a+3b is
    A. 27:36 B. 29:27 C. 27:29 D. 26:29 E. 17:19
16. If 2x +3y:2x+y=3:2, then x:y=……….
    A. 3:2 B. 2:3 C. 4:3 D. 3:4 E. None of them
17. The cost of 40 pens is k. 360 and the cost of 30 pencils is k. 90. The ratio of the cost of a
    pen to that of a pencil is
    A. 1:3 B. 1:4 C. 3:1 D. 4:1 E. 16:3