A particle in uniform circular motion is an object that moves in a circular path at a constant speed. This means that the particle covers equal distances in equal amounts of time, and its velocity remains constant throughout the motion.
The centripetal force is the force that keeps a particle in uniform circular motion moving in a circular path. It is directed towards the center of the circle and is responsible for continuously changing the direction of the particle's velocity.
The centripetal force is directly proportional to the square of the speed of the particle and inversely proportional to the radius of the circle. This means that as the speed of the particle increases or the radius decreases, the centripetal force also increases.
If the speed or radius of the particle in uniform circular motion changes, the centripetal force also changes accordingly. If the speed increases, the centripetal force must also increase to keep the particle in a circular path. Similarly, if the radius decreases, the centripetal force must increase to maintain the particle's circular motion.
Yes, a particle in uniform circular motion can experience a net force. The centripetal force is always present in a particle's circular motion, but there may be other forces acting on the particle that are not directed towards the center of the circle. In this case, the net force will affect the particle's speed or direction of motion.