Bob is a Cub Scout and his trying to create a winning "Pine Wood Derby" race car. The kit that he receives from Scout Master contains many different size wheels. Because of Bob's desire to win, he decides that he will design an experiment to see which set of wheels will give his car the highest velocity. To start his experiment he writes the following investigative question. After reading the investigative question, identify the IV and DV, and identify the constants. Investigative Question: Does the size of the wheel affect the velocity of the car when rolled down a ramp?