SELECT * FROM question_mgmt as q WHERE id=4124 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=8 AND subId=16 AND chapterId=187 and ex_no='6' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 9th science Motion an artificial satellite is moving in a circular or

Question:

An artificial satellite is moving in a circular orbit of radius 42250 km. Calculate its speed if it takes 24 hours to revolve around the earth.

Answer:

Distance covered by satellite in 24 hours, s = 2πr = 2 × 3.14 × 42250 = 265330 km 

Time = 24 h

Speed = 265330 / 24

 = 11055.4 km/h

 = 11055.4 / 3600 = 3.07 km/s


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