1.

A train traveling along a straight track with a speed of 2 ms-1, begins to accelerate with a=2/v ms^-2where v is in ms-1. Find its velocity after 3 seconds in m/s.​

Answer»

Answer:

8ms-1

Explanation:

The acceleration of an object can be calculated by the FORMULAR

A=(vf-vi)/Tf-Ti)

Where A =Acceleration

          Vf=Final VELOCITY

          Vi= Initial velocity

           Ti=Initial Time

           Tf =Final Time

In this case,

    A=2/V MS -2

     Vi=2ms-1

     Ti-Tf we are given as 3 SECONDS

     Therefore to find Vf after three seconds, We assume that;

     Vf= X

Replacing Vf in the formular

        2=(x-2ms-1)/3

         6=x-2

            x=8

        Replacing x with Vf

             Vf=8



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