g ball


  • Ball can be used to measure the free-fall time of an object.
  • Release of a button on ball’s face starts a digital timer. Timer automatically stops upon collision.
  • Please use a landing cushion, such as the styrofoam pad shown above, to prevent the risk of cracking face of digital timer.

Air-flow levitation

Bernoulli's Principle levitation 1

Bernoulli's Principle suction 1

Bernoulli's Principle suction 2

  • Air-flow around ball causes nonintuitive levitation and stability.
  • A nozzle connected to the air-blower creates a narrow stream of fast moving air.
  • Ball can be levitated directly above air nozzle, or at an angle.
  • When funnel is connected to air hose, air flow around ball creates lift, preventing ball from falling, even when air flow is directed downwards.
  • Blower, nozzle and funnel located in L35. Ball in L02 section A2.

Doppler Ball


Attach noise-maker to battery and insert into styrofoam ball (ball has large slit).

Toss ball (play catch with student volunteer) to hear change in pitch.

  • Located in L02, section C-2

Impulse Block

impulse block 1

  • Two different balls can be rolled down incline to collide with wooden block. When rubber, bouncy ball collides with block, block tips over.
  • However, when non-bouncy ball collides with block (looks identical to bouncy ball) block does not tip over. Balls have same size and weight.


  • Balls and block located in L02, section B5.
  • Track in Lo2, section B2.
  • Jacks in L35, section D1.

Energy Ball


Energy ball demo photo

Energy ball demo photo 2

Touching both electrodes at the same time completes the circuit and causes the ball to light up. If one person touches one electrode and another person touches the other the ball will not light up; but if the two people then touch each other the ball will light up. A circuit chain consisting of multiple students can be created.

  • Located in L01, section B-4.


Rail Gun


Rail Gun Demo Picture

  • Demo is very reminiscent of Newton’s Cradle, but with one cool trick. Students expect that when one ball roles in, one ball roles out; and the final height of the outgoing ball is approximately equal to the starting height of the incoming ball .
  • However, one of the balls is highly magnetic (though identical in size and weight). This additional force causes the outgoing ball to shoot entirely off the track. See video at this link- http://www.arborsci.com/magnetic-accelerator.
  • Located in L02, section B-5