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Discuss with the students the material under Overview and Teacher
Text so that each child has some understanding of friction in
relationship to Newton's First Law of Motion.
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Talk about safety tips that need to be observed while going down the
hill. Each person needs to take their turn in line, make sure that you
wait along enough time before being pushed down the hill, and replace the
cardboard when it starts falling apart.
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Have each student take a turn going down the hill on a piece of
cardboard. They start their ride down by a push by one other student.
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Then the second trip down have students pair up and go down two at a
time, being pushed by two other students. In this way, the students can
compare their first ride alone with the second ride. (The friction
changes when there are two students on the cardboard).
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Return to the class and discuss what happened on the hill on their
first 'ride' and in their second 'ride' in relationship to friction and
Newton's First Law of Motion.
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For the older students have them write a short essay on friction and
how it affects Newton's First Law of Motion.
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