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.


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