Science project

Does it Pay to Cheat in Baseball?

Research Questions:

  • What are two ways a batter can increase the momentum of the bat?
  • How does the speed of a bat affect momentum?
  • How does the weight of a bat affect momentum?

A bat is "corked" when the end of it has been drilled out and the hole created is stuffed with cork. The bat is then capped off so that it looks as if it hasn't been altered. Cork is thought to make the bat lighter, allowing the batter to swing faster, providing more momentum. The more momentum a batter has with a bat, the farther we would expect the ball to go when it's hit. However, corking can also decrease the weight of a bat, decreasing momentum. Does the extra speed of the swing make up for the lighter weight?


  • Two identical bats
  • Drill with a ½ inch bit
  • Wood vise
  • Hammer
  • Punch
  • Cork sheeting
  • White glue
  • Permanent marker
  • Baseball
  • Ball tee
  • Tape measure
  • Pen and/or pencil
  • Lab notebook

Experimental Procedure:

  1. Choose one bat to be corked. Clamp the bat in the wood vise. Mark the center of the wide end of the bat. Use the hammer and punch to dimple the wood so that the drill bit won't slip when starting. Note: Have an adult drill a ½ inch in diameter hole, no more than 6 inches deep. Make sure to drill straight along the long axis of the bat.
  2. Fill the hole with the cork. Pack it tightly.
  3. Use a permanent marker to label the bat that has been corked.
  4. Cap the end of the bat with a wooden disk and glue.
  5. Let the glue dry overnight.
  6. The next day, you can perform the test. You'll want to hit 25 balls with each bat, alternating bats with each swing. Attempt to swing at the same speed every time. You'll need to measure the flight distance of each ball hit and record it in your notebook.
  7. Analyze your data. Average the distances of the balls hit with the corked bat. Then average the distances of the balls hit with the unaltered bat. Which bat gave the best results? Why do you think that particular bat had the better results? You can graph your data to illustrate your reults.

Terms/Concepts: mass; velocity, momentum, diameter, speed, distance


Disclaimer and Safety Precautions provides the Science Fair Project Ideas for informational purposes only. does not make any guarantee or representation regarding the Science Fair Project Ideas and is not responsible or liable for any loss or damage, directly or indirectly, caused by your use of such information. By accessing the Science Fair Project Ideas, you waive and renounce any claims against that arise thereof. In addition, your access to's website and Science Fair Project Ideas is covered by's Privacy Policy and site Terms of Use, which include limitations on's liability.

Warning is hereby given that not all Project Ideas are appropriate for all individuals or in all circumstances. Implementation of any Science Project Idea should be undertaken only in appropriate settings and with appropriate parental or other supervision. Reading and following the safety precautions of all materials used in a project is the sole responsibility of each individual. For further information, consult your state's handbook of Science Safety.

Add to collection

Create new collection

Create new collection

New Collection


New Collection>

0 items