What Is the Gravitational Force on a 20-Kg Satellite Circling
What is the gravitational force on a 20-kg satellite circling the Earth (radius = 6.4 106 m,mass = 6.0 1024 kg)with a period of 5.0 h?
Two satellites are placed in geosynchronous orbits,orbits with a period of 24 hours,where each satellite hovers over a spot on the Earth's equator.Satellite B has three times the mass of satellite A.What is the relationship between the magnitudes of the gravitational forces of the Earth on the two satellites?
A)FB = FA.
B)FB = FA.
C)FB = FA.
D)FB = 3FA.
E)FB = 9FA.
A satellite is placed in a geosynchronous orbit.In this equatorial orbit with a period of 24 hours,the satellite hovers over one point on the equator.Which statement is true for a satellite in such an orbit?
A)There is no gravitational force on the satellite.
B)There is no acceleration toward the center of the Earth.
C)The satellite is in a state of free fall toward the Earth.
D)There is a tangential force that helps the satellite keep up with the rotation of the Earth.
E)The force toward the center of the Earth is balanced by a force away from the center of the Earth.
Two identical planets orbit a star in concentric circular orbits in the star's equatorial plane.Of the two,the planet that is farther from the star must have
A)the smaller period.
B)the greater period.
C)the smaller gravitational mass.
D)the larger gravitational mass.
E)the larger universal gravitational constant.