The simulation kept track of the time and automatically recorded data on cart displacement and velocity. If the cart trials were run with a real cart and fan using meter sticks and stopwatches, how might the data compare? Check all that apply.

A real cart-and-fan trial would involve uncontrolled factors, such as small changes in the fan or cart motion, making the data less reliable (A). Meter sticks have limited precision and can be misread (C), and people may make errors while timing, recording, or plotting measurements (E). A stopwatch does not automatically make the data just as valid, and real fans do not always perform exactly the same way as virtual fans.

AI-written and checked against the verified answer.