Question

A car starts from rest and acquires velocity of 54km/h after 20 sec what will be the acceleration of car??


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Answer 1

v = 54*1000/3600 m/s² = 15 m/s²

a = (v-u)/t = {(15-0)/20} m/s² = (15/20) m/s²

= 0.75 m/s² or 75 * 10^-2

Answer 2

Answer:

Explanation:

given    :- velocity (v) = 54 km/hr

                time (t) = 20 sec

here  first of all we will have to convert  km/hr into m/s because units are not same

54 km/hr= 15 m/s

by newton's 1st law of motion

 v =u + at

15 = o + a × 20

a   = 15 /20

 a =  3/4

a=  0.75 m/s²

 

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