physics

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A body travels along a circular path of radius 70 m.After travelling half a revolution in 20 s find the ;
1.average velocity
2.average speed

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The body changed position, from one side of the circle, to the other.

displacement=changeposition/time=2PIr/20

there has to be a direction associated with displacement, my drawing has it West.

average speed: distance/time=2PIr/20

average velocity: 2PIr/20 West

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