Discuss forces which are acting on a model car placed on the table. Discuss friction effect. Discover why friction is a force which acts opposite the push or pull force. Discuss friction in terms of irregular surface. Discuss the effect of friction on the motion of the object. Elicit the affect on the car if no friction was present on the surface. Discuss what is necessary in order to prevent the car from stopping. Illustrate infinite movement from a single force if friction was zero. Discuss inertia as a force needed to overcome friction to begin movement.