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Do It
photo of two jars grab
  • an empty jar with a lid
  • a second jar, filled to the top with water, and a tight-fitting lid
  • a large three-ring binder, or other ramp
  1. Twist the lids tightly onto the 2 jars.
  2. Move them to the top of the binder, resting them on their sides.
  3. Release them at the same time, and watch them go! Which jar races ahead?
what happened?
Try the experiment, tell us what happens and watch DFTV for your results! Which jar rolled faster along the table top?

  view results
whiz quiz
What's the record for fastest land speed in a car?

dragonflytv PBS Kids Go!