Question

initial velocity is 80km/h final velocity is 60km/h time is 5 sec. find acceleration

Answer 1

a=v-u/t
=60-80/5
=-20/5
=-4m/s2 is the answer .
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Answer 2

Answer:

10m/9s²

Explanation:

We first convert Km/h into m/s

80km/h x 1000/3600 = 200m/9s

60km/h = 150m/9s

we know acc. = change in velocity

time taken

a= v-u

t

= 200m - 150m divided by time(5s)

9s

= 50m / 5= 50m x 1

9s. 9s. 5s

= 10m/9 s²