An Earth satellite of mass m revolves at a height from the surface of the Earth. If R is the Earth's radius and g is the acceleration due to gravity at the surface of the Earth, then the velocity of the satellite is given by:
2gR²/ R+hD.
gR / R+h.
√ [gR²/ (R+h)].
√ (gR / R+h).
Who was the first person to realize that the planets move in elliptical paths around the Sun?
Kepler.
Brahe.
Copernicus.
Einstein.
At a height 2R above the earth’s surface, where R is the radius of the Earth. The acceleration of free fall, g is 1.09m s⁻². What is the gravitational force on a mass of 10 kg at a height R above the Earth’s surface?
24.5 N.
15 N.
20 N.
18 N.
