Question

A car starts from rest and after 20 seconds it's velocity becomes 108km\h.find the acceleration​

Answer 1

Explanation:

The formula of acceleration is:



where    - acceleration      

          - change in velocity and

          - change in time

In the above problem, initial velocity is zero and the final velocity is 108 km/hr. So change in velocity is:

 

And the given change in time is 20 seconds. For the unit to be consistent, convert the seconds to hours.



Then, substitute the values of  and  to the formula of acceleration.



Hence, the accelearion of the car is 19,440  .

Answer 2

Answer:

5.4 is the any

Explanation:

108/20

5.4km/h²