Question

in a pendulum experiment, how could you study the effect of distance on potential energy? change the mass of the weight change the length of the string change the air temperature of the room

Explanation:

Step1: Recall potential - energy formula

The potential energy of a pendulum is $U = mgh$, where $m$ is mass, $g$ is gravitational acceleration, and $h$ is height. To study the effect of distance on potential energy, we need to change a factor related to distance.

Step2: Analyze each option

The length of the string affects the height $h$ that the pendulum - bob can reach for a given angular displacement. Changing the mass of the weight changes the mass $m$ factor (not related to distance for this study), and changing the air - temperature of the room has no direct relation to the distance - related factors in the potential - energy formula.

Answer:

Change the length of the string