Lesson 2: Drag: The Force That Fights The Ball
When a golf ball moves through the air, the air pushes back. This opposing force is called drag — and it is the enemy of distance.
Imagine running through a swimming pool. The water pushes back against every step. Air does the same thing to a golf ball — just less obvious because air is less dense than water.
The faster the ball moves, the more drag it experiences. Drag is most powerful right after impact when the ball is at its highest speed, and least powerful near the end of the flight.
Golf balls and equipment are carefully designed to minimize drag — to slip through the air as efficiently as possible. Shape, dimples, and materials all play a role.
Drag is the air resistance that opposes a moving object. More speed = more drag. Streamlined shapes = less drag.
A smooth golf ball would experience more drag than a dimpled one — which is why dimples were invented!
Hold a flat piece of cardboard and walk quickly — feel the resistance, that is drag. Now turn it sideways so the thin edge faces forward. Much easier! This is why golf balls are round.
Drag shapes in water: make four small foil shapes — a sphere, a cube, a flat disc, and a pointed cylinder. Drop them from the same height into a bucket of water. Which sinks fastest? Which slowest? Rank them by drag and draw the four shapes in your journal.
Water shows drag differences more clearly than air. The sphere should sink fastest of the blunt shapes; the flat disc slowest. The physics is the same in air — just more visible in water.