A group of four students are investigating how gravity affects balls of different sizes. Each student brings in their favorite ball. Each student then stands on a table or desk in the classroom and drops the ball from as high up as they can reach. The time it takes to reach the ground is measured. Is this a good experiment? A. Yes, this is a good experiment.
B. No, gravity cannot be investigated by dropping objects.
C. No, they should only drop two objects for best results.
D. No, there are too many things changing in this experiment.