# science

posted by crystal

A bus starts from rest and attains 40km/hr velocity after 10sec . Calculate the acceleration of bus in m/sec2

1. Nonetheless

First convert 40 km/hr to m/hr:
40 km/hr x 1000 m/km
= 40 000 m/hr
Now convert 40 000 m/hr to m/s:
40 000 m/hr / 3600 s/hr
~ 11.11 m/s

acceleration = change in velocity / change in time

= (11.11 m/s - 0 m/s) / 10 s
= ?

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