If a satellite moves above the Earth's atmosphere in a circular orbit with constant speed, then:
A)its acceleration and velocity are in the same direction
B)the net force on it is zero
C)its velocity is constant
D)it will fall back to Earth when its fuel is used up
E)its acceleration is toward the Earth

Question

Quizplus · Accepted Answer

In a circular orbit, a satellite is constantly changing direction, which means it is accelerating. This acceleration is due to the gravitational pull of the Earth, which acts toward the center of the Earth. Thus, the satellite's acceleration is toward the Earth, even though its speed remains constant.

If a Satellite Moves Above the Earth's Atmosphere in a Circular