What is the equation to find how fast the earth travels around the sun?

Answer 1

The equation would be the distance traveled divided by the time.

So the radius of the Earth's orbit is about 93 million miles, and the formula to calculate the circumference of a circle is 2*pi*radius. The Earth's orbit is not a circle but an ellipse; however, the eccentricity (amount of difference between the ellipse and a perfect circle) is quite small.

The time of the orbit is 356.24 days times 24 hours, or 8766 hours. (Rounded off, because I'm using round numbers for the radius and blowing off the eccentricity of the orbit). I'll round off the irrational number "pi" to 3.1412, because it would be irrational to use anything more precise, since the radius is approximate, too.

So 584,263,200 miles / 8,766 hours = 66,650 miles per hour.

Approximately.

Answer 2

Speed = (distance) divided by (time to cover the distance)

Distance = circumference of earth's orbit

Circumference of a circle = (pi) x (diameter of the circle)

Earth's average distance from the sun = 93,000,000 miles

Diameter of the approximate circle = 186,000,000 miles

Circumference = distance around = 186,000,000 pi miles

Speed = (186,000,000 pi) miles per year.

You can take care of crunching the numbers, and change it to 'miles per hour' if you

want to. You'll get something like 66,700 miles per hour, or 18.5 miles per second.