Question

An artificial satellite is moving in a circular orbit of radius 42250 km calvulate its speed if it takes 24 hours to revolve aronud earth

Answer 1

The radius given in your question is slightly more than the radius of Geo stationary orbit. So practically its impossible to maintain or keep the satellite at that orbit with a time period 24 hours. The satellite will drop down to lower orbit.

Answer 2

Hey there!

Given,

Radius (r) = 42250 km

Time (t) = 24 hours

Distance will equal to perimeter of the orbit

= 2πr

= 2π * 42250

Speed of artificial satelite  

= 2π * 42250/24

= 11059 km/h

Hope It Helps You!