Acurious student thinks that she can use plastic bag to change the time it takes a toy car to fall from the top of bedroom window. by attaching a plastic bag to the toy car, she thinks she can increase air resistance. she attaches the bag to both sides of the car (like a parachute) and proceeds. she knows she has two different sizes of bags (small and large) so she can vary the amount of air resistance three times - (no bag, small bag, and large bag). with a stopwatch in hand, she drops the toy car from her window and watches carefully for it to hit the ground. she does 3 trials for each change she makes.
1. is this a qualitative or quantitative experiment?
2. what is the independent variable?
3. what is the dependent variable? (provide unit too)
4. list 2 variables that she should control during this experiment.