What is centrepetal force? Derive an expression for it? Show that centripetal does no worl?
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an object moving in a circle at a constant speed does so because of a force acting towards the centre. We call this force the centripetal force. The force is given by the equation F=mv2/r
where is the mass of the object moving in the circle, is its speed, and is the radius of the circle. More correctly, remembering that force is a vector, it should be written
where is the magnitude (size) of the radial vector , and is the unit vector in the direction of .
khakhlary:
answer is incomplete
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