Question

a car is moving in a straight line in 5 sec 54 km/h​

Answer 1

Answer:

it's speed is 8km/sec

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Answer 2

Answer:

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Explanation:

Acceleration comes out to be -3.

and the graph and its use in taking out the distance covered.

explanation of part A.

given is:-

Initial velocity (u)=54 km/h that is 15 m/s.

Final velocity (v)=0

Time (t)=5 sec.

To find:-Acceleration (a)

solution:- v=u+at(first equation of motion)

substituting the values

0=15+a×5

0=15+5a

-15=5a

-15/5=a

-3=a

Therefore acceleration is -3.

OR

Retardation/deaccleration is 3.

Hope it will help.