Physics · GRAVITATION
हिन्दीThe orbital speed of a satellite revolving in a circular orbit close to the surface of the Earth (\( h \ll R_E \)) is given by:
Correct answer · Option 3
\( \sqrt{gR_E} \)
Explanation
For \( h = 0 \), the centripetal force is \( mv^2/R_E = GM_E m/R_E^2 \implies v = \sqrt{GM_E/R_E} = \sqrt{gR_E} \).