Question

a car attains 54 metre per second in 20 seconds after it starts from rest find the acceleration of the car​

Answer 1

Car Start from Rest Attains 54 m/s in 20 seconds.

Intial Velocity (u)=0 m/s (rest)

Final Velocity (v)=54 m/s

Time given (t)=20 seconds.

Accerlation=a

Using Equation of Motion

v=u+at

54=0+a×20

20a=54

a=54/20

a=27/10

a=2.7 m/s²

Acceleration=2.7 m/s²

What is Accerlation.

Rate of Change in Velocity in particular time period is called Accerlation.

Like if Accerlation is 2 m/s²

Means every second its Velocity is increasing by 2 m/s

Answer 2

Explanation:

v=54m/s

t=20 s

u=0

a=54-0/20=54/20=2.7 m/s^2

I hope it works....