A bus accelerates uniformly from 36 kilometres per hour to 72 kilometres per hour in 20 seconds. find the distance travelled by bus.

Answers (1)

v=u+at

given 

\\u=36km/h=36\times\frac{5}{18}m/s=10m/s\\v=u=72km/h=72\times\frac{5}{18}m/s=20m/s

20=10+a\times20

a=0.5m/s^2

\\v^2-u^2=2as\\400-100=2\times0.5\times s\\s=300m

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