⏱️ THE PENDULUM PRINCIPLE
PAGE 1 OF 5, THE STEADY SWING
A SIMPLE SWING
NATURE'S METRONOME
A pendulum is a weight hanging from a string or rod that can swing freely under gravity. Pull it to one side and let go, and it arcs back and forth. The time for one full trip out and back is called the period. For small swings, that period is surprisingly steady. It does not depend on how heavy the bob is, and it barely changes if you start the swing a little wider or a little narrower. What matters most is the length of the string and the strength of gravity. That reliable beat is why pendulums became the heart of accurate clocks for centuries.
⚡ PERIOD
Period means the time for one complete swing cycle. A shorter string ticks faster. A longer string ticks slower.
TICK!
WHAT MATTERS
📏 Length sets the beat for small swings
🌍 Gravity (g) also affects the period
⚖️ Mass of the bob does not matter
🌍 Gravity (g) also affects the period
⚖️ Mass of the bob does not matter
WHAT DOES NOT
🪨 Heavy and light bobs keep the same time
📐 Small angle changes barely shift the period
💨 Air drag slows it, but the rule still guides clocks
📐 Small angle changes barely shift the period
💨 Air drag slows it, but the rule still guides clocks