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One of Newton's laws of motion tells us that when a body is moving, it wants to do so in a straight line. If a body is moving on a curved path (say in a circle), there must be some force acting on the body to make it move in a curved path. This force is called centripedal force.

Centripedal Force

Newton also tells us that for every action, there is an equal and opposite reaction, and the opposite to centripedal force is centrifugal force. This force acts in the opposite direction to centripedal, it acts radially outwards.

Read more here about Newton's three laws of motion, and how they affect small plant vibrating machinery.

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