Planetary and Space Science
To know the answer, let’s calculate the surface speed of earth. Considering earth radius as 6,371 km, its circumference (2𝜋r) becomes 40,009 km. Note that here value of 𝜋 is considered as 3.14. The rotational speed of the earth is 1 revolution per 24 hr. ( More accurately its 23hr 56 min 4.09053sec) That means at the Equator, any still object on the surface travels 40009km in 24 hr. Which is around 1667km/hr, or 27.78 km/min, and so 463 m/s. That means any person standing at the equator of the earth travels at the speed of 463 m/s which is 1.34 times higher than the speed of sound which is 343m/s. So the answer is yes, we are moving at a speed higher than the speed of sound, but the other question is that are we all moving at the same speed? Are we moving at speed higher than sound speed? Are we all moving at same speed? Comment your answers and share your views.