Question

velocity of a velocity changes 6m/s to 4m/s in 10 seconds.caluate its acceleration

Answer 1

a=v-u/t
=6-4/10
=2/10
=0.2m/sec.square

Answer 2

Since , the final velocity is less than it's initial velocity , we will calculate retardation ( same as acceleration )
(v - u ) / t = a
(4-6) / 10 = 2/10 = 1/5 = 0.2 m/s ^2
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