Physics
Physics
Problem
The gravitational field strength at the surface of a planet of radius is . A satellite is moving in a circular orbit a distance above the surface of the planet. What is the magnitude of the acceleration of the satellite? A. 0 B. C. D.Intuitive explanation
The key is recognizing that gravitational field strength at the surface tells you about the planet's mass, and then using the inverse-square law to find the field strength at a different distance. Since the satellite orbits at distance from the planet's center (not ), the gravitational acceleration there will be weaker by a factor that depends on the ratio of distances squared.
Intuitive explanation
The key is recognizing that gravitational field strength at the surface tells you about the planet's mass, and then using the inverse-square law to find the field strength at a different distance. Since the satellite orbits at distance from the planet's center (not ), the gravitational acceleration there will be weaker by a factor that depends on the ratio of distances squared.