Question

a car accelerates uniformly from 18 km/h to 54 km/h in 5 seconds. find the distance covered by the car in the given time.

Answer 1

initial velocity u = 18 km/h = 5 m/s

final velocity v = 54 km/h = 15

time t = 5 s

distance = ?

.

$= > a = \frac{15 - 5}{5} \\ \\ = > a = 2 \: m {s}^{ - 1} \\ \\using \\ = > s = ut + \frac{1}{2} a {t}^{2} \\ \\ = > s = 5 \times 5 + \frac{1}{2} \times 2 \times 25 \\ \\ = > s = 25 + 25 \\ \\ = > s = 50 \: m$