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 1

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  2

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


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