when is an object said to be in uniform circular motion
Circular motion In physics, circular motion is a movement of an object along the circumference of a circle or rotation along a circular path. It can be uniform, with constant angular rate of rotation and constant speed, or non-uniform with a changing rate of rotation. The rotation around a fixed axis of a three-dimensional body involves circular motion of its parts. The equations of motion describe the movement of the center of mass of a body.
Arctic Circle The position of the Arctic Circle is not fixed; as of 22 January 2018, it runs 66°33′47.0″ north of the Equator.[1] Its latitude depends on the Earth's axial tilt, which fluctuates within a margin of 2° over a 40,000-year period, due to tidal forces resulting from the orbit of the Moon.[2] Consequently, the Arctic Circle is currently drifting northwards at a speed of about 15 metres (49 feet) per year.