Question

The diagram shows a satellite that is moving at a uniform rate in a circular orbit around the Earth.

Which statement describes the motion of this satellite?

A It is accelerating because its speed is changing.
B It is accelerating because its velocity is changing.
C It is not accelerating but its speed is changing.
D It is not accelerating but its velocity is changing.

Answer

As the satellite orbits the Earth, the speed remains the same but the velocity changes.

Since the velocity is changing, there is acceleration.

Answer is B.