Investigating centripetal force
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M.Daniel Investigating centripetal force Introduction When an object is moving in a circle its direction and hence its velocity, is continually changing. A force is needed to make this happen. If you attach an object to one end of a piece of string, and holding the other end whirl it around steadily in a horizontal circle, you can feel that a force is required to make the object move in a circular path. The force acts along the string toward the center. This force is called the centripetal force [center seeking force]. Whenever an object moves in a circle [or arc] a centripetal force acts upon it. When a car goes round a bend a force acts inwards on the cars tires, as the planets go round the sun, and as an athlete throws a hammer there is a centripetal force acting towards the center of the circular path. The size of the centripetal force: *...

