Question

A satellite needs a specific velocity to revolve in a specific orbit. State with reasons whether the sentence are true or false.

Answer 1

satellite needs a specific density involved in a specific Orbit....

statement is true...............

Answer 2

Answer:

Yes the statement is true.

Explanation:

Every satellite  performing a circular motion needs a specific velocity called called a orbiting velocity.

we know that when object performing a circular motion it experience a centripetal force which is given by

$F = m\frac{v^{2}}{r}$........................(1)

where m = mass of the satellite, r = distance from the centre of earth to the orbit

we know that there is a force of attraction between earth and satellite

$F = \frac{GMm}{r^{2} }$.....................(2)

M = mass of the earth

from (1) and (2) we have

$v =\sqrt{\frac{GM}{r} }$