Question

A car start from rest and achieves a speed of 54 km/h in a second find its acceleratoin

Answer 1

acceleration is change in velocity with time..

so, a=?

since it's starts from rest so its initial velocity will be zero and it is given that final velocity is 54km/hr==15m/s

so..

a=(0–15)/3

-15/3

=-5is the acceleration or there is retardation...

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