Centrifugal force is an apparent force that acts on an object moving in a circular path, pulling it away from the center of the circular motion. It is not a 'real' force, resulting from the interaction between two physical objects, but it is a fictitious force - or an effect - created by the inertia of the object following the curve. Imagine a ball spinning around a fixed point on the end of a string. The ball wants to travel in a straight line, but the string prevents it from escaping. The force pulling the ball away from the center and making the string taut is the centrifugal force, which arises from the ball's tendency to continue its motion in a straight line.
### Instruction:
Explain what is a centrifugal force.

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