Question

1o. An artificial satellite is moving in a circular orbit of radius
42250 km. Calculate its speed if it takes 24 hours to revole
around the earth​

Answer 1

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• $\bf\:Radius=42250\:km$

• $\bf\:Time\:=24\:hr$

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• $\bf\:Speed\:(v)\:=\dfrac{Distance}{Time}$

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☛Distance = circumference of circular orbit

$\bf\:=2\pi{r}$

$\bf\:=2\times\:\dfrac{22}{7}\times\:42250$

$\bf\:=265571.42\:km$

then,

$\bf\:Speed\:(v)\:=\dfrac{265571.42}{24}$

$\bf\:Speed\:(v)\:=11065.47\:km/h$

$\bf\therefore\:Speed\:of\:an\:artificial\:Satellite$

$\bf\:=\dfrac{11065.47}{60\times\:60}$

$\bf\:=\dfrac{11065.47}{3600}$

$\bf\:=3.073\:km/s$