Measure the acceleration due to gravity with a simple drop test The g by Free Fall apparatus offers the simplest, most direct way to measure the acceleration due to gravity through a classic mechanics experiment. Designed for clarity and reliability, this system times a falling ball bearing with precise start and stop signals—eliminating unnecessary complexity. With no power supply required and quick reset between trials, it’s ideal for repeatable, student-friendly investigations of free-fall motion. Why Teachers Love the g by Free Fall Apparatus Simple, reliable design: Removes unnecessary electronics while delivering accurate results. Precise timing: Start and stop signals occur at exact moments of release and impact. No power supply needed: Works with any sensitive millisecond timer with START/STOP triggering. Quick reset: Easy to repeat trials for averaging and improved accuracy.