Centripetal and Centrifugal Force

Have you ever wondered why you don’t fall out of an upside down loop on a roller coaster, or why a satellite can stay in orbit around the earth? Centripetal force is a force that causes an object to move along a curved path by pulling the object towards the center of the path. The velocity (speed and direction) of the object is constantly changing because the direction of the object is constantly changing, even though the speed remains the same unless acted upon by an outside force. The direction of such an object at any given point is always perpendicular to the centripetal force.For a circle, the centripetal force is given by the following equation:F = mac = (mv2 / r)Where F is the force in Newtons, m is the mass of an object in kilograms, and ac is the centripetal acceleration which can also be described by v2/r, the square of the velocity divided by the radius (the distance from the center of the circle).

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