For further information, consult your state's handbook of Science Safety.
Theball should not be thrown, and the person dropping the ball should not stand on chairs or tables.
Independent variables There are many independent variables (which can also be called the manipulated variable- the variable that is varied in the investigation), but I will only vary two of them: the height the ball is dropped, The surface material the ball is dropped on will also be changed.
Have you ever asked yourself how much energy or effort it really takes to dribble a basketball?
Energy can only mean one thing: the strength required in a physical or mental activity such as basketball.