A car increase it’s speed from 40 km/hr to 72km/hr in 5 sec calculate it’s acceleration​

2 thoughts on “A car increase it’s speed from 40 km/hr to 72km/hr in 5 sec calculate it’s acceleration​”

1. Answer:

   u = 40 x 5/18 m/s = 11.11 m/s

   v = 72 x 5/18 m/s = 20 m/s

   Now v = u + at

   20 = 11.11 + a x 5

   8.89 = 5a

   a = 8.89/5 = 1.778 m/s^2

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2. Answer:

   acceleration=v-u/t

   a=72-40/5

   a=6.4

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