Question

A car is travelling at 20 km /h speed up to 60 km /h in 6 seconds. What is its
acceleration.​

Answer 1

Explanation:

u= 20 km/h = 20*5/18= 50/9 m/s

v= 60 km/h = 60*5/18= 50/3 m/s

t= 6 s

a= v-u/t

 = 50/3-50/9÷6  

 = 100/9÷6

 = 100/9×1/6

 =  50/27 m/s^2

=1.85ms2

Answer 2

Answer: initial velocity= 20 km/ hr = 20× 5/18 = 50/9

final velocity = 60 km / hr = 60× 5/18 = 50/3

acceleration= 50/3 - 50/9 ÷ 6 =. 50/27 = 1.85..... m/s2