The simulation kept track of the variables and automatically recorded data on object displacement, velocity, and momentum. if the trials were run on a real track with real gliders, using stopwatches and meter sticks for measurement, how might the data compare? check all that apply. - there would be variables that would be hard to control, leading to less reliable data. - the data would be just as valid if it were recorded with a stopwatch. - meter sticks may lack precision or may be read incorrectly. - real glider data may vary since real collisions may involve loss of energy. - human error in recording or plotting the data could be a factor. - controlling real glider velocities by hand would be just as accurate as simulation controls.