Question

Classify the following measures as scalars and vectors.

(i) 10 kg         (ii) 2 metres north-west   (iii) 40°
(iv) 40 watt     (v) 10^–19 coulomb     (vi) 20 m/s²

Answer 1

(i) 10 kg is a scalar quantity because it involves only magnitude.
(ii) 2 meters north-west is a vector quantity as it involves both magnitude and direction.
(iii) 40° is a scalar quantity as it involves only magnitude.
(iv)40 watts is a scalar quantity as it involves only magnitude.
(v) 10^–19 coulomb is a scalar quantity as it involves only magnitude.
(vi)20 m/s² is a vector quantity as it involves magnitude as well as direction.