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28-10-2016
Physics

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A train is accelerating at a rate of 2m/s2. if it's initial velocity is 20 m/s , what is its velocity after 30 seconds

Respuesta :

04-11-2016

(v₂-v₁)/t = a

(v₂-20)/30 = 2

v₂-20 = 60

v₂ = 80 m/s

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