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Question

Average velocity of a particle moving in a straight line, with constant acceleration a and initial velocity u in first t seconds is:


A

u

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B

u+at

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C

u+at2

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D

u+at2

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Solution

The correct option is C

u+at2


Given, initial velocity is u, acceleration is a and total time taken is t.
Let s be the displacement of the particle.
From second equation of motion,
s=ut+12at2.
Average Velocity=Total displacementTotal time

Average velocity=ut+at22t
=u+at2


Physics

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