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








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Answer 1

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ANSWER --. ,

we know that speed = distance travelled / time taken

here, distance travelled = perimeter of the orbit = 2πr = 2π x 42250 km

time taken = 24 hours so,

speed of artificial satellite = 2π x 42250 / 24 thus

,speed = 11059 km/hr

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Answer 2

r = 42250 km

time = 24 hrs or 86400 sec.

speed = 2πr/t

2×22/7×42250/86400

44/7×4225/8640

265,571.429/8640

3.07 km/s-¹