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determine the speed of Earth's orbital motion in meters per second

Taking Earth's orbit to be a circle of radius , determine the speed of Earth's orbital motion in meters per second.

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Need to work out how far the earth has travelled or in other words the displacement of the earth given as (delta r). This change can be worked out because we are told that the earth has a circular orbit of a known radius.

Simply using the equation for a circles circumference will give us the distance the earth travels in 1 year.

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