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.
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Answer 1

Answer:

$\huge\boxed{\fcolorbox{green}{orange}{SPEED》》}}$

42250km÷24 hours

1760.41666667 km / hr

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Answer 2

Given:

• Radius, = 42250 km

• Time taken,t = 24 h

To be calculated:

Calculate its speed( v )?

Solution:

The speed of an body moving in circular path is given by formula;

Speed = 2πr/t

We know that ,

The value of π = 22/7

Now,

Putting the values in the above formula, we get

Speed = 2 × 22 × 42250/7 × 24

= 44 × 42250/168

= 1,859,000/168

= 11065.4 km/h

We can convert speed from kilometers per hour to kilometers per second:

Speed = 11065.4/60 × 60

= 11065.4/3600

= 3.07 km/s