Mathematics Part-II

Book: Mathematics Part-II

Chapter: 10. Vector Algebra

Subject: Maths - Class 12th

Q. No. 2 of Exercise 10.1

Listen NCERT Audio Books - Kitabein Ab Bolengi

2

Classify the following measures as scalars and vectors.

(i) 10 kg (ii) 2 meters north-west


(iii) 40° (iv) 40 watt


(v) 10-19 coulomb (vi) 20 m/s2

Scalars are defined as quantities that have magnitude only.


Vectors are defined as a quantity that has magnitude as well as direction.


(i) 10 kg: It is a measure of mass. It is a scalar quantity as it has magnitude only and no direction.


(ii) 2 meters north-west: It is a measure of distance in a particular direction. It is a vector quantity as it has magnitude as well as direction.


(iii) 40°: It is a measure of angle. It is a scalar quantity as it has magnitude only and no direction.


(iv) 40 Watt: It is a measure of power. It is a scalar quantity as it has magnitude only and no direction.


(v) 10-19 coulomb: It is a measure of electric charge. It is a scalar quantity as it has magnitude only and no direction.


(vi) 20 m/sec2: It is a measure of acceleration. It is a vector quantity as it is a measure of rate of change of velocity.


2

Chapter Exercises

More Exercise Questions

5

Answer the following as true or false.

(i) and are collinear.


(ii) Two collinear vectors are always equal in magnitude.


(iii) Two vectors having same magnitude are collinear.


(iv) Two collinear vectors having the same magnitude are equal.