#### 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.

#### Solution

Radius of the circular orbit, *r* = 42250 km

Time taken to revolve around the earth, *t* = 24 h

Speed of a circular moving object, `v=(pir)/t`

`=(2xx3.14xx42250)/24=265330/24=11055.4" km/h="`

If we want speed in kilometer per second then,

`=11055.4xx5/18`

`=3070.9444444" m/sec"`

`=3070.9444444/1000`

`=3.070" km/s"`

Is there an error in this question or solution?

Solution 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. Concept: Equations of Motion by Graphical Method - Equation for Velocity-time Relation.