Question

Solve:
11.A car is travelling at 20 km/h, it speeds upto 60 km/h in 6 seconds. What is its acceleration​

Answer 1

u=20km/h

v=60km/h

t=6s

a=(v-u)/t

a=60-20/6

a=40/6=20/3=6(2/3)km/h^2

Answer 2

Given

initial velocity = u = 20km/h = 5.56 m/s

final velocity = v = 60km/h = 16.67 m/s

Time taken = t = 6s

To find:

Acceleration (a)

Answer:

$\sf{a\:=\:\frac{(v-u)}{t}}$

a = $\frac{(16.67-5.56)}{6}$ m/s²

a = $\frac{11.11}{6}$ m/s²

a = 1.85167 m/s²