.A physical quantity must be expressed with its number and  ……….. .   1.unit
2. A unit is a  ……….. quantity.   2.standard
3. Mass is a ……..quantity.   3.basic
4.Area is a ……….quantity.   4.derived
5.The British system is also called the ……. system.   5.FPS
6. 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
9. The SI unit of area is the ……… .  9.m2
direction is ………. .
4. The ……… changes the state of motion of a body.
5. The new vectors obtained from sub-dividing a vector is called ……… .
6. Q ⃗   and  - Q ⃗ are  in ……… directions.
7. Time is not a ……… quantity.
8. Displacement is not a ……… quantity.
9. The maximum value of the resultant of two vectors acting at a point occurs when they are in
    ………. directions.
10. If the sum of the  vectors is  zero, the two vectors have