I took my youngest daughter Sydney to school today and her teacher Mrs. Vanscoy showed me the new smart boards that they used to replace the old chalkboards. Those things are reall cool and it got me thinking how that my daughter may never experience that horrendous, bone grating ”Squeaky chalk” sound that my generation grew up with.
So, Why does a piece of chalk produce that hideous squeal? According to the book, The Flying Circus of Physics (With Answers), squealing chalk results from the phenomenon of “stick and slip.” Incorrectly held chalk actually sticks to the blackboard. But when the writer bends the chalk enough, it suddenly slips and vibrates, sporadically striking the chalkboard and producing that squeal we hear. As the vibrations decrease, the friction between the chalk and the board increases until the chalk sticks again and the torture begins once more.
If you think about it, Christ followers could learn an important moral lesson from squeaky chalk: “Friction affects everybody”. Is it any wonder Jesus said, “Blessed are the peacemakers, for they will be called sons of God.(Matthew 5:9) It makes me wonder if more people might entertain the Gospel of Christ if they weren’t holding their ears in horror because of the shrill sounds of Christian friction.

