A student wants to determine the effect of mass on kinetic energy. She will drop two balls of the same size into a pool of water which investigation method should the student use.
1 answer
The student should use the method of varying the mass of the balls while keeping all other variables constant. This will allow the student to isolate the effect of mass on kinetic energy, as any differences in kinetic energy can be attributed to the change in mass of the balls. By controlling for variables such as the size of the balls and the height from which they are dropped, the student can ensure that any differences in kinetic energy are solely due to changes in mass.