Question

A student is conducting an experiment to determine how far a ball will roll down a ramp based on the angle of incline. What are three possible controls for this experiment?

Answer 1

same ball, same ramp length, same material of ramp, same ruler, same force applied to roll the ball, etc

Answer 2

The length of the ramp, the speed and weight of a ball

Step-by-step explanation:

A controlled experiment needs to be done with constant values and one variable value. According to this experiment, the only variable value is the angle of the incline. And the student must hold constant the length of the ramp where each ball rolls. The ball speed and its weight.

By doing this, He can determine how far a ball rolls over the same length ramp, depending on the variable angle of the incline.