Question

Classify the following measures as scalars and vectors.
(i) $10kg$
(ii) $2metres$ north-west
(iii) ${40}^o$
(iv) $40watt$
(v) ${10}^{-19}$ coluomb
(vi) $20m/s^2$

Answer 1

(i) $10kg$
"kg" is unit of mass which is a scalar quantity because it involves only magnitude.

(ii) $2\text{meters north-west}$ is a vector quantity as it involves both magnitude and direction.

(iii) ${40}^o$ is a scalar quantity as it involves only magnitude.

(iv) $40\text{watts}$ a scalar quantity as it involves only magnitude.

(v) ${10}^{-19}$ coulomb is a scalar quantity as it involves only magnitude.

(vi) $20{\text{m/s}}^2$ is a vector quantity as it involves magnitude as well as direction.