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Test force, motion, and friction. Build an adjustable roller ball race track with a cardboard box.
What is friction? Think of everyday experiences involving force, motion, and friction. Talk about how friction acts upon moving objects to slow them.
In small groups, design roller ball race tracks from recycled cardboard boxes and construction paper. One way is to turn a box on its side and reassemble it so one side bends down as a ramp. <B>Ask an adult to help</B> if you need to cut the box with Crayola® Scissors.
Stabilize the box with masking tape. Cut box top flaps into ramp supports. Create different angles.
Cut paper to cover box surfaces. Attach with Crayola School Glue. Air dry.
Mark ramps with lanes and label ramp support levels with Crayola Washable Markers.
Gather balls of different sizes, shapes, and surface textures. Mold your own balls with Crayola Model Magic. To vary the weight and texture, add aquarium gravel. Air dry overnight.
Cut different surfaces (sandpaper, aluminum foil, fabric) to attach to ramps to vary the friction.
Experiment! Predict rolling speeds of various combinations of balls, ramp levels, and friction surfaces. Create data grids with markers. Use a stopwatch to time your experiments. Record relative or actual ball speeds. Color code data. What did you find?
People around the world give thanks for their food. Celebrate a harvest of pineapples, pumpkins, or pomegranates-and sho
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Our crayons have been rolling off the assembly line since 1903, and you can see how it’s done.
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