jocelynnhdz1022 jocelynnhdz1022
  • 10-09-2019
  • Physics
contestada

What is the acceleration of the train if it takes 8 seconds to reach 45 m/s?

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kusidesmo
kusidesmo kusidesmo
  • 10-09-2019

Answer:5.6m/s^2

Explanation: Since the initial velocity (u) was not given, it's assume that the train was at rest hence it's initial velocity (u) =0

From Newton's first equation of motion,

Where v=u+at ,where v= final velocity ,u = initial velocity, a= acceleration and t= time

Now given v= 45 u=0 t=8 and a=? Substituting the values into the equation, thus : 45= 0+8a making a the subject in the relation , a= 45/8 = 5.6m/s^2. As the acceleration of the train

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