Question

A car increas its speed from 20km/h in 10 secondsto100km/h find its acceleration

Answer 1

Answer:

u=20km/hr= 50/9 m/s

v=100km/hr= 250/9

t=10 seconds

a= v-u/t

a= 250/9- 50/9/10

a=20/9=2.22 m/s^2

Explanation:

Answer 2

Answer:

2.22 m/s^2

Explanation:

Acceleration=final velocity-initial velocity/time

final velocity (v)=100 km/h

                 = 100x1000/60x60

                 =27.7 m/s

initial velocity (u)=20 km/h

                   =20x1000/60x60

                   =5.5 m/s

time(t) = 10 sec

a=v-u/t

a=27.7-5.5/10

a=22.2/10

a=2.22m/s^2

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