Question

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

Answer 1

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

Answer 2

Answer :-

Initial velocity, u = 20 km/h

Final velocity, v = 60 km/h

Time, t = 6 seconds

u = 20 km/h = 50 / 9

v = 60 km/h = 50 / 3

Acceleration, a = $\sf \dfrac{v - u}{t}$

→ a = $\sf \dfrac{\dfrac{50}{3} - \dfrac{50}{9}}{t}$

→ a = $\sf \dfrac{\dfrac{100}{9}}{t}$

→ a = $\sf \dfrac{50}{27}$

→ a = 1.85 m/s²