The Magic School Bus Science Explorations A
Rub a Dub
rubbing together cause a force called friction.
Why does a rolling
2. Put a marble at the top of the launcher. Let go.
3. Use a ruler to measure from the marble launcher to where the marble stopped. In the chart, write down how far it went.
your launcher on a carpet, a large piece of cardboard, and on other kinds
of floors. What caused the most friction?