Demonstrate the motion of a freely falling body, determine g, and study the basic laws of motion with our well-known apparatus. The sturdy cast iron and steel column provides a long 1.5m falling distance for an accurate reading. When the free-fall body, held at the top by an electromagnet, is released, its fall is recorded by a spark generator. The marks made at intervals on the spark-sensitive tape attached to the column give students a permanent record of the fall. This data can be used to make a distance-time graph and a velocity-time graph; students can then calculate acceleration.

The apparatus comes with a heavy tripod base with leveling screws, a free-fall body, a weighted clip to anchor the spark paper, an electromagnet, and an illustrated experiment manual. A 6-volt AC/DC power supply and spark generator and tape are needed. Overall height of apparatus is 1.95m.