A student wants to find out how the length of a simple pendulum affects its time period (the time for one complete swing). Identify the independent variable, dependent variable, and at least two controlled variables in this experiment.

Question

Accepted Answer

Independent variable: Length of the pendulum (deliberately changed by the student). Dependent variable: Time period of the pendulum (measured, depends on length). Controlled variables: Mass of the bob (should stay the same), the angle/amplitude of swing (should stay small and the same each time), and the location/gravity (kept constant since the experiment is done in the same place).