Your turn: compare two pendulums

Predict which takes longer for one complete swing. Change only the gold pendulum's length.

Under the same gravity, the period of an ideal small-angle pendulum scales with the square root of its length.

Original ExplainerTools small-angle model with the same gravity, ideal point bobs, light supports, and no damping. Period T = 2π√(L/g). Four times the length gives twice the period in this approximation.