Since the object's velocity vector is constantly changing direction, the moving object is undergoing acceleration by a centripetal force in the direction of the center of rotation. In circular motion, the distance between the body and a fixed point on the surface remains the same.Įxamples of circular motion include: an artificial satellite orbiting the Earth at a constant height, a ceiling fan's blades rotating around a hub, a stone which is tied to a rope and is being swung in circles, a car turning through a curve in a race track, an electron moving perpendicular to a uniform magnetic field, and a gear turning inside a mechanism. The equations of motion describe the movement of the center of mass of a body. The rotation around a fixed axis of a three-dimensional body involves circular motion of its parts. It can be uniform, with constant angular rate of rotation and constant speed, or non-uniform with a changing rate of rotation. In physics, circular motion is a movement of an object along the circumference of a circle or rotation along a circular path.
The lifting force acts normally to the aeroplane body, When the aeroplane tilts, the horizontal components acts normally to the plane motion towards the center of the circle causing the plane to turn in a curve, This means that the horizontal component of the lifting force on an aeroplane acts as a centripetal force. This means that the centripetal force is the sum of the two components one of the reaction force and the other of the friction force towards the center of rotation. The friction force : Its horizontal component also acts towards the center of the circle and helps the car to move in a curved path. The reaction force : that always acts normally to the car, Resolving this reaction into two components, the horizontal component acts towards the center of the circle and helps the car to move in a curved path. When a car moves in a circular path that is inclined to the horizontal, It is affected by a number of forces :
When a car turns in a circular path or a curve, a friction forcebetween the road and the car tyres is originated, This force acts normally to the direction of the car motion towards the center of the circle causing the car to move in a curved path, This means that the friction force may behave as a centripetal force. Gravitational force ( F G )Īn attractive force exists between the Sun and the Earth in a direction perpendicular to the path of the Earth, This force causes the Earth to move in a circular path around the Sun, This means that the gravitational force may behave as a centripetal force. When pulling a body by a string or a wire, a tension force is originated, If this tension force is normal to the direction of motion of a body moving at constant velocity, this force causes the body to move in a circular path, This means that the tension force may behave as a centripetal force. The centripetal force is the force that acts continuously perpendicular to the path of a moving body, causing it to move in a circular path, From these forces : Tension force ( F T )
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