Question

At a speed of 1,07,200 km per hour, the earth travels around the sun to complete one _____.

• A. Evolution
• B. Revolution
• C. Evaluation
• D. None of these

Answer 1

Answer: (B)

Revolution

Speed of the Earth's Rotation at the Equator:

Circumference of the Earth at the Equator = 40,000 kilometers
Time to complete one Rotation = 24 hours

Speed of Rotation = Distance/Time = 40,000 km / 24 hr = 1670 km/hr
• The speed of revolution around the Sun is even larger:
  

Speed of the Earth's Revolution around the Sun:
Speed of Revolution = Distance/Time = 942,000,000 km / 8766 hr = 107,000 km/hr = 30 km/sec.