7k hnobm

True\False
1.A physical quantity which has direction as well as magnitude is known as vector,

1. Displacement has both magnitude and direction.
2. The sum of three vectors, having unequal magnitude, can be equal to zero.
   4.If P ⃗ + Q ⃗=0, P ⃗and Q ⃗ have the same magnitude.
3. Vector R ⃗ and –R ⃗ have the same directions.
   6.All basic quantities are scalar.
4. A vector quantity has no direction.
5. A weight vector and a displacement vector can be added.
   (1) Newton’s first law gives the idea of ……… .
   (2) By Newton’s second law , the acceleration is directly proportional to ……… .
   (3) Newton’s third law express the idea of ………. .
   (4) Action force and reaction force cannot ……… out each other.
   (5) Force has both magnitude and ……. .
   (6) Force is a ……… quantity.
   (7) The SI unit for force is ……….. .
   (8) Mass is a measure of ………. .
   (9) The attracting force of the earth acting on a body is defined as