Question

9. A car accelerates uniformly from 18 km/h to 36 km/h in 5s. Calculate acceleration in
(i) km/h? (ii) m/s2​

Answer 1

Answer:

Explanation:

acc=36-18/5

=18/5

=3.6 km/h2

=(3.6*1000)/(3600)

=1 m/s²

Answer 2

Explanation:Acceleration(a)=change on velocity/ time

Initial velocity (u)=18 km/hr = 18×5/18= 5m/ s

Final velocity (v)= 36 km/hr = 36×5/18= 10 m/s

Therefore, a=(v-u)/t

a=10-5/5

=5/5

=1m/s^2

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