The formula for centripetal force is: (f) = mass of the object (m) * tangential velocity (v) squared / distance from the center or radius (r). Centripetal force is measured in Newtons, and one Newton equals 0.225 pounds, according to Education Portal.
The mass of an object can be determined by multiplying the number of pounds of the object by 0.454. The radius can be determined by dividing the diameter by 2. Since the tangential velocity is squared, the centripetal force can be quadrupled by doubling the velocity. The smaller the mass or velocity, the smaller the centripetal force. The smaller the radius, the larger the centripetal force.