Plastic Center Groove Ruler
12 in / 30cm
Rulers measure 12"/30cm
Center Groove for pencil or science experiments
Varied Color Plastic
Includes both U.S. customary and metric scales
Features holes for easy storage in a binder
Sold Individually (Our color choice)
* This is the type ruler used in physics experiments with cups and marbles.
Newton's 2nd Law of Motion
Place one end of the ruler on an incline (book)
Rest the other end in a paper cup that you have cut a notch out of
Roll a marble down the middle of the ruler
- note the distance the cup moves.
Now, add a book to make the incline steeper and repeat...