BBC Learning Zone Clips

CLIP 10897

Gravity, momentum and air resistance on falling objects

Gravity, momentum and air resistance on falling objects
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Key Info
  • Gravity, momentum and air resistance on falling objects
  • Duration: 02:10
  • Starts with a description of the force of gravity. Two identical bottles, one full and one almost empty, are the dropped from the same height to show the heavy one falls faster. This is followed by an explanation that although the forces of gravity and air resistance are the same on both bottles, the heavier one has more momentum and can therefore push against the force of air resistance more and so falls faster. Archive footage from the Moon shows that without air resistance, objects of different mass fall at the same speed.
  • Subject:

    Science

       Topic:

    Phys: Forces - Motion

  • Keywords: gravity, momentum, air resistance, force, forces, Newton, mass, BangGoesTheTheory
Ideas for use in class
  • Clip 46 from the Bang Goes the Theory teachers pack. To download the pdf please go to bbc.co.uk/schools/teachers/bang/ Stimulus for discussion about the effects of gravity, air resistance, momentum and resultant force. Can be used to explain momentum of falling objects. The results of this classic experiment are shown very clearly in slow motion.
Background details
  • Clip language : English
  • Aspect ratio : 16x9

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