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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. |
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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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