Question

what is orbital velocity describe an expressions for it​

Answer 1

Answer:

Orbital velocity for a planet is the required velocity by which an object can move in the planet orbital

Answer 2

What is orbital velocity?

Orbital velocity is the velocity given to artificial satellite so that it may start revolving around the earth

Expressions for orbital velocity?

(the figure is in the attachment)

Orbital velocity of satellite is defined as minimum velocity required to maintain a satellite in given orbit

$\sf f_{c}=\frac{mv^{2}}{R}$

$\sf f_{G}=\frac{GMm}{R^{2}}$

for balancing

$\sf \frac{mv^{2}}{R}=\frac{GMm}{R^{2}}$

$\sf\boxed{v=\sqrt{\frac{GM}{R}}}$