. If the sum of the vectors is zero, the two vectors have same magnitude and ………
directions.
11.Quantities that have only ………. are called scalars.
- A ……… has both magnitude and direction.
- The change in position along a certain direction is called ……… .
- Force is a ……… quantity.
- Mass is a …….. quantity.
- The combined effect of two (or) more vectors is called …….. .
- The vector sum of two vectors is called ……… vector.
18.The process of sub-dividing into two or more vectors is called ……… . - A vector can be represented by an ………. .
- Vectors of ………. kinds may not be added.
- Only vector quantities of ………. kind may be added.
- If D ⃗ =-4C ⃗, the magnitude of D ⃗ is ………. than that of C ⃗.
- If A ⃗, B ⃗ and C ⃗ satisfy the equation A ⃗+B ⃗-C ⃗=0, then C ⃗ is ……… vector of A ⃗and B ⃗.
- The magnitude of the resultant force of a 12 N pointing east and a force of 5 N
- The nuclear force is a ……. range force.
(20) The ratio of mass to volume is defined as ……… .
(21) The density of ice is ……….. than that of water.
(22) The symbol of density is ρ and it is a …….. quantity.
(23) The SI unit for pressure is …….. .
(24) The total momentum of an …….. system is constant.