Lesson 2: The Perfect Swing: Physics in Motion
A golf swing is a chain of physical events happening in about one second. Let’s trace what physics is doing at each stage.
The backswing stores potential energy — like drawing back a bowstring. Your muscles build up energy that will be released into the club.
The downswing and impact converts stored energy into kinetic energy. The club accelerates, reaches maximum speed at impact, and transfers energy into the ball via compression and elastic rebound.
The follow-through is not just for show — it ensures maximum energy transfer. A swing that stops at impact loses energy. A full follow-through means the club was still accelerating through the ball.
Backswing = storing energy. Impact = transferring energy. Follow-through = ensuring maximum energy transfer.
A complete follow-through means the club was accelerating through the ball — not slowing before impact.
Swing analysis: with a parent or coach, record a slow-motion golf swing on a phone. Watch it and pause at three moments: (1) top of backswing — where is the stored energy? (2) just before impact — how fast is the club moving? (3) the follow-through — how does it compare to professional swings? Write three physics observations about your own swing.
Slow-motion video on a smartphone is a remarkable free teaching tool. The follow-through observation is particularly useful because most young golfers instinctively decelerate before impact. Seeing this on video is more convincing than any verbal instruction.