Centrifugal force, is only non-existant on a technical level. Used as a concept for the understanding of the inertia of a body in circular motion, centrifugal force becomes quite useful. More on topic, yes, a truck will generally have more inertia (and therefore more centrifugal force) than a car, but the real contribution to the tire squeal on a truck is a combination of suspension articulation and different tire design. Truck tires generally have much larger tread blocks, which are more prone to squeal than are the softer rubber and smaller tread block car tires. And yes, tires squealing would sound like a belt squealing because a belt is rubber also.
Zenmervolt