Question

can any one explain the difference between the centrifugal and centripetal force with an practical example from our daily life

Answer 1

When an object's movement is in the shape of a circle than what ever forces are acting on it must add vectorially up such that they point towards the centre of the circle. These are simply your regular forces, such as Tension, Normal, Weight, etc. If they do add up to a nonzero value and the object is moving in the circular fashion, than we call this unbalance or net force, Centripetal or centre seeking. An example would be the passenger door on a unseatbelted passenger in a car, if the car is turning left and to make things more obvious, at high speed. The door actual pushes the passenger in the circle. The force of the door on the person ( a normal force ) is considered to be the centripetal force. Centrifugal force is commonly thought of as the force that the passenger would be applying to the door in response ( newton's third law ). If the door were to be slightly ajar, it would open from this force... however, it would actually be opened (?) due to its inertia to continue in a straight line... I think that there really isn't centrifugal forces, just inertia...

Answer 2

The forces along the radial direction of the motion of, say a ball on a string must add to zero. Though there is a force acting on the object that results in a turn (the force of the tension of the string on the ball), the object does not move toward the center because that force is balanced in the radial direction by the centrifugal force outward.As soon as the inward tension of the string T exceeds that of the outward centripetal force (labelled -T in the drawing) the object begins moving closer to the center.
All forces do come in action reaction pairs, this is not a trivial fact, and is essential here. There is indeed such a thing as centrifugal force.

Answer 3

Hey, I would tell you the practical example on board the ships. We need to feed purified oil in the main engine and auxiliary engines. What we do is, we use a purifier for the same. We fill up a daily tank from the settling tank by allowing the fuel to pass through the purifier. In the purifier, we have many discs which rotates at the rpm of around 9000rpm and with the help of centripetal force, the impurities will fall away and stick to the stationery surface. The clean oil will move up and would be purified. If you need further help, you can call me up by following the profile link http://about.me/gauravwalia