Question

An artificial satellite is moving in a circular orbite of radius 42250km . calculate its speed if it takes 24 hours to revolve around the earth.
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Answer 1

Hey Pretty Stranger!

Given radius = 42250 km

Time taken = 24 hours

Distance Travelled = Circumference of Orbit

→ Distance = 2 × π × r

→ Distance = 2 × $\sf\dfrac{22}{7}$ × 42250

→ Distance = $\sf\cancel\dfrac{1859000}{7}$

→ Distance = 265464.58 km

Now,

Speed = Distance Covered/Time taken

→ 265464.58/24 × 60 × 60

→ 2654.58/ 86400

→ 3.07 km/s

$\therefore$ Speed of the satellite is 3.07 km/s.

Answer 2

Explanation:

distance covered by the satellite is 2πr

there fore

2×3.14×42250 is the distance covered.

=265464.58km.

speed=distance covered/time taken

=265464.58/24×60×60

=3.07km/s