Question

One full year is 365.26 days. Using this number and the distance between the sun and the earth, calculate the Earth's velocity. M earth=5.98*10^24kg M sun= 1.99*10^30 r Earth=6380 Formula F G=GmM/r^2

Answer #1

**Solution:**

Assumption : The earth revolves around the sun in a circular orbit.

One full year is 365.26 days.

Distance between the sun and the earth is .

Total distance travelled by the earth in 1 revolution around the sun = Circumference of the circular orbit of radius .

Circumference of the circular orbit of radius

Time taken by earth to complete one revolution around the sun

The earth moves around the sun with a constant speed in a circular orbit.

Speed of earth = distance travelled / Time taken to cover the distance

The earth revolves in a circular orbit so the direction of motion changes. The direction of velocity is always tagential at any point of the circle.

Hence, velocity of earth

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