joe 9math

.A physical quantity must be expressed with its number and ……….. . 1.unit

1. A unit is a ……….. quantity. 2.standard
2. Mass is a ……..quantity. 3.basic
   4.Area is a ……….quantity. 4.derived
   5.The British system is also called the ……. system. 5.FPS
3. Length , mass and ……. called basic quantities. 6.time
   7.The unit of mass in CGS system is ……….. . 7.gram
   8.We use a ruler for measuring ……….. . 8.length
4. The SI unit of area is the ……… . 9.m2
   direction is ………. .
5. The ……… changes the state of motion of a body.
6. The new vectors obtained from sub-dividing a vector is called ……… .
7. Q ⃗ and - Q ⃗ are in ……… directions.
8. Time is not a ……… quantity.
9. Displacement is not a ……… quantity.
10. The maximum value of the resultant of two vectors acting at a point occurs when they are in
    ………. directions.
11. If the sum of the vectors is zero, the two vectors have