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 1

ATQ, we have to find the speed of the artificial satellite if it's taking 24 hours to move in a circular orbit of radius 42250km.

given time = 24 hours

distance = circumference of the circular orbit

therefore the distance covered by the satellite in 24 hours = 2πr

= 2 × 22/7 × 42250

= 1859000/7

= 265571.429km

therefore it's speed = distance/time

= 265571.429/24

= 11065.48km/h

HOPE THIS HELPS..!!

Answer 2

HEY DEAR ... ✌️

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Thanks , For Your Question ...

=) Given ,
Radius of a circular orbit = 42250 km .

Now , Changing km to m .
=) 42250 × 1000
=) 42250000 m .

Also , Time taken to revolve around the Earth (T) = 24 × 60 × 60

We know , Speed of artificial satellite (v) =
$\frac{2\pi \: r}{t} \\ \frac{2 \times 3.14 \times 42250000}{24 \times 60 \times 60} \\ 3070.9 \: ms{}^{ - 1} \\ 3.07km {}^{ - 1}$

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HOPE , IT HELPS ... ✌️