Marble Cannon

Gather Supplies

  • 50cm x 50cm wood board
  • 45cm PVC pipe
  • 18cm PVC pipe
  • 45cm wooden dowel rod
  • 2 springs
  • Hose clamp
  • 2 tube straps
  • 3 25cm tall wood blocks
  • 2 hooks

Step 1:

  • Connect the 3 wood blocks to the wooden base using wood glue and screws.

Step 2:

  • Using the tube straps, drill the short PVC pipe into place loose enough to spin on top of the wood blocks.

Step 3:

  • Using another strap, drill the long PVC pipe onto the small one so that the angle of the cannon can change.

Step 4:

  • Drill a hole at the end of the wooden dowel and put in a metal rod through it.
  • Add nuts to hold the metal rod in place as well as connect one end of each spring to the wooden dowel.

Step 5:

  • Use a hose clamp to connect hooks and springs to the PVC pipe.

Step 6:

  • All done!

Step 7:

The calculations show

  • Time launch took
  • Initial velocity using kinematic equations
  • Force using work-energy equations

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