A train accelerate uniformly from 86 km /h to 72 km /h in 20s. Find the distance travelled
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acceleration = 23.89-20=3.9m/s^2
(convert everything into m/s)
thus s=1/2at^2
s=0.5*3.9*400
s=780m
(convert everything into m/s)
thus s=1/2at^2
s=0.5*3.9*400
s=780m
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