Question

A car moves towards east and covers 50 km in 30 min. Calculate: (a)the displacement of the car, and (b) its velocity in (i) km h^-1 and (ii)m s ^-1 ​

Answer 1

According to the Question we have to find :-

• The displacement of the car
• Its velocity in km h^-1
• Its velocity in m s ^-1

Required Solution :-

(a) Distance Covered = 50 km

So, Displacement = 50 km towards east.

(b) (i) Velocity = $\frac{Displacement}{Time}$

= $\frac{50}{30 / 60}$

= $\frac{50 \times 60}{30}$ ${km\:h}^{-1}$

= $100$ ${km\:h}^{-1}$

(ii) Velocity = $\frac{100×1000}{3600}$

= $\frac{100×5}{18}$

= 27.77 ${m\:s}^{-1}$