Question

a bus is travelling at 72km/h accelerates uniformly for 10 seconds to attain a velocity of 90 km/h find it's acceleration​

Answer 1

Explanation: convert km/h to m/s

5/18×72=20m/s

5/18×90=25m/s

u=20m/s

v=25m/s

a=v-u/t=25-20/10=0.5m/s⁻²

hence the acceleration=0.5m/s⁻²

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Answer 2

Explanation:

v1=72km/h

=72×5/18

=20m/s

v2=90km/h

=25m/s

time =10s

accelaration = 25-20/10

=1/2ms^-2