Discover Freefall System - ME-9889



PASCO's Discover Freefall System can be used to drop almost any small object by attaching a small steel washer with a small adhesive pad (both are included in the system). Using an electric switch, timing is started automatically just as the object is dropped and the Time-of-Flight Pad stops timing when the object strikes it.

Students can investigate the effect of air resistance on acceleration. In addition, students can drop objects of the same size but different mass to study how object mass affects terminal velocity during freefall. The drop box has a magnetic mount for attaching to metal frames in ceilings.

This redesigned system can also accept the Target Accessory to perform the shoot-the-target demonstration.


  • Drop box
  • Control cable
  • Control box
  • AC adapter
  • Time-of-Flight receptor pad
  • Timer Switch
  • Release washers (10)
  • Release labels for attaching washers to object (50)
  • Small nylon ball
  • Large plastic ball
  • Golf ball
  • Hollow golf ball
  • 1" steel ball
  • 5/8" steel ball
  • How It Works

    Any small object can be dropped with the Discover Freefall System by attaching a washer to the object with an adhesive pad (both included).  The Drop box's active feedback loop measures the magnetic field and adjusts current to null field and release ball in less than 1 ms once the electric switch is pressed.

    Buying Guide

    PASPORT Digital Adapter
    Smart Timer

    The Discover Freefall System connects directly to the 550 or 850 Universal Interface.  For all other current interfaces a Digital Adapter is required.  For standalone use the Smart Timer.

    PASPORT Digital Adapter   PS-2159
    Smart Timer   ME-8930

    Interface Required

    To use this product you need a PASCO interface. 

    New to probeware or have questions about  sensors or interfaces? Contact Teacher and Technical Support.  We're here to help!

    Software Required

    This product requires or recommends PASCO software for data collection and analysis. Either SPARKvue software or PASCO Capstone software may be used.