Q. 24.3( 35 Votes )

# 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/s^{2}

Answer :

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/sec ^{2}:** 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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