A race horse runs straight towards north and covers 540 m in one minute. Calculate (i) displacement of horse, (ii) its velocity in (a) $m s^{- 1}$ (b) $k m h^{- 1}$ .

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Solution

Displacement is $540 m$ along north direction.

$(a) v = \frac{d i s p l a c e m e n t}{t i m e} = \frac{540}{60} = 9 m / s$

$(b) v = 9 m / s = 9 \times \frac{18}{5} = 32.4 k m / h$

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A race horse runs straight towards north and covers 540 m in one minute. Calculate (i) displacement of horse, (ii) its velocity in (a) ms−1 (b) kmh−1.

Displacement is 540m along north direction.(a)v=displacementtime=54060=9m/s(b)v=9m/s=9×185=32.4km/h

A race horse runs straight towards north and covers 540 m in one minute. Calculate (i) displacement of horse, (ii) its velocity in (a) $m s^{- 1}$ (b) $k m h^{- 1}$ .

Displacement is $540 m$ along north direction.

$(a) v = \frac{d i s p l a c e m e n t}{t i m e} = \frac{540}{60} = 9 m / s$

$(b) v = 9 m / s = 9 \times \frac{18}{5} = 32.4 k m / h$