Question

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

Answer 1

Answer:

acceleration=v-u/t

a=72-40/5

a=6.4

Answer 2

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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