What happened when you changed the mass on the end of the pendulum?

When the mass on the end of the pendulum was changed, the period of the pendulum's swing remained largely unaffected, as the period is primarily determined by the length of the pendulum rather than its mass. However, increasing the mass could lead to greater kinetic energy and a more noticeable amplitude in the swing, while decreasing the mass might result in a less pronounced swing. In practical terms, heavier masses may also introduce more friction and air resistance, affecting the overall motion slightly.