1670 kilometers/hour. I have written the answer, but Mr DMR I have a query. Could you please elaborate, is this speed constant & what if the speed increases or decreases. What is affecting the speed?

Earth does not rotate aaround the Sun. Earth rotates on its axis once in 24 hours. Earth revolves around the Sun once in a year. You can easily calculate the average speed. The circumference of ERarth's orbit is 2(pi)Xthe distance of Earth from Sun, which is 93 million miles or 150 million kilometers, choose your favorite unit. Divide this by the number of days in a year (365.2422) for speed per day, or by the number of seconds in a year for speed per second

As we know that the time it takes for the Earth to go once around the Sun is 1 year. So in order to know the speed we just have to figure out the distance traveled by the Earth when it goes once around the Sun. To do that we will assume that the orbit of the Earth is circular (which is not exactly right, it is more like an ellipse, but for our purpose it will do just fine). So the distance traveled in one year is just the circumference of the circle. (remember that the circumference of a circle is equal to 2*pi*Radius)

The average distance from the Earth to the Sun is 149,597,890 km. Therefore in one year the Earth travels a distance of 2*Pi*(149,597,890)km. This means that the velocity is about:

velocity=2*Pi*(149,597,890)km/1 year

and if we convert that to more meaningful units (knowing there is 365 days in a year, and 24 hours per day) we get:

velocity=107,300 km/h (or if you prefer 67,062 miles per hour)

## 10 comments:

1670 kilometers/hour.

I have written the answer, but Mr DMR I have a query.

Could you please elaborate, is this speed constant & what if the speed increases or decreases. What is affecting the speed?

Sorry for the wrong answer. My answer relats to the rotation not the revolution..

Earth does not rotate aaround the Sun. Earth rotates on its axis once in 24 hours. Earth revolves around the Sun once in a year. You can easily calculate the average speed. The circumference of ERarth's orbit is 2(pi)Xthe distance of Earth from Sun, which is 93 million miles or 150 million kilometers, choose your favorite unit. Divide this by the number of days in a year (365.2422) for speed per day, or by the number of seconds in a year for speed per second

As we know that the time it takes for the Earth to go once around the Sun is 1 year. So in order to know the speed we just have to figure out the distance traveled by the Earth when it goes once around the Sun. To do that we will assume that the orbit of the Earth is circular (which is not exactly right, it is more like an ellipse, but for our purpose it will do just fine). So the distance traveled in one year is just the circumference of the circle. (remember that the circumference of a circle is equal to 2*pi*Radius)

The average distance from the Earth to the Sun is 149,597,890 km. Therefore in one year the Earth travels a distance of 2*Pi*(149,597,890)km. This means that the velocity is about:

velocity=2*Pi*(149,597,890)km/1 year

and if we convert that to more meaningful units (knowing there is 365 days in a year, and 24 hours per day) we get:

velocity=107,300 km/h (or if you prefer 67,062 miles per hour)

Thanks Shubham.... it has to be revolution not rotation around sun.I have corrected the Question.

Regards

DMR

107,300km/hr

the speed is 107,300km/hr

Approx 107542 km/hr.

your welcome sir.

107,218km/h

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