Question

V= t^2 m/s, the average velocity from 2 s to 4 s is:

Answer 1

Answer:

Initial velocity at 2sec = 2^2 m/s = 4 m/s

Final velocity at 3 sec = 3^2 m/s = 9 m/s

So Average Velocity

= ( Initial velocity + Final velocity) /2

= ( 4 + 9) /2 m/s

= 13/2 m/s

= 6.5 m/s

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Answer 2

Answer:

Total Displacement = Area under v-t graph

=πr 2 /2=π×1 2 /2=π/2m

Average velocity = Total Displacement / total time= 2π/2

= 4πm/s