Question

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

Answer 1

20 kmph = 20 × 5/18 m/s

60 kmph = 60 × 5/18 m/s

Acceleration = (v - u) / t

= [(60 - 20) × 5/18] / 6

= 1.85 m/s^2

Answer 2

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

ans.