* The body has a constant speed. This is given in the problem statement.
* The body has a changing velocity. Velocity is a vector quantity, meaning it has both magnitude (speed) and direction. Even though the speed is constant, the direction of motion is constantly changing as the object moves in a circle.
* The body has an acceleration. Acceleration is the rate of change of velocity. Since the velocity is changing (due to the changing direction), there must be an acceleration. This acceleration is called centripetal acceleration and it points towards the center of the circle.
* There is a net force acting on the body. Newton's Second Law states that a net force causes an acceleration. Since the object is accelerating (due to the change in velocity), there must be a net force acting on it. This force is called the centripetal force and it also points towards the center of the circle.
Statements that don't apply:
* The body has no acceleration. This is incorrect because the body's velocity is changing.
* The body has no net force acting on it. This is incorrect because acceleration requires a net force.
Key Point: While the speed might be constant, the changing direction of motion results in a changing velocity, which in turn requires an acceleration and a net force.
