Question

State an important characteristic of uniform circular motion. Name the force which brings about uniform circular motion.

Answer 1

Hint: An essential feature of uniform circular motion is that speed keeps constant while the direction of motion alters continuously with the period, so it is accelerated. The centripetal force causes uniform circular motion. This force is constantly directed towards the middle of the circular path, and it is with the radius of the circular path.

Complete step-by-step solution:
Circular motion is a motion of an object or rotation along a circular path. It can be uniform, with the constant angular rate of rotation and constant speed, or non-uniform with a changing rotation rate. The rotation around a constant axis of a three-dimensional body involves the circular motion of its parts. The motion equations describe the motion of the centre of mass of a body. The length between the body and a fixed point on the surface persists in a circular motion.
Examples of circular motion constitute an artificial satellite revolving the Earth at a fixed height, a ceiling fan's blades turning around a hub, a stone that is attached to a rope and is being turned in circles, a car turning through a race track, an electron traveling perpendicular to a uniform magnetic field, and a piece of equipment turning inside a mechanism.
Since the object's speed is constantly changing direction, the traveling object is undergoing acceleration by a centripetal force in the centre of rotation direction. According to Newton's laws of motion, the object would move in a straight line without this acceleration. In physics, uniform circular motion describes a body traversing a circular path at a constant speed. Since the body represents circular motion, its distance from the rotation axis remains uniform at all times. Though the speed of the body is constant, its velocity is not consistent: velocity, a vector quantity, depends on the body's speed and direction of travel. This dynamic velocity indicates acceleration; this centripetal acceleration is of fixed magnitude and directed at all points towards the rotation axis. This acceleration is produced by a centripetal force that is also constant in magnitude and directed towards rotation.
An essential characteristic of uniform circular motion is that the direction of motion changes continuously with time, accelerated. Centripetal force brings about uniform circular motion.
Note: In the rotation around a constant axis of a rigid body that is not negligibly little compared to the path radius, each particle of the body represents a uniform circular motion with the equal angular velocity but with velocity and acceleration varying with the position of the axis.