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Talk with the students about inertia in simple terms.
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Take a few minutes to talk about safety - no tripping others.
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Using the tape or chalk, mark a start line, two midpoints at 10 feet
and 20 feet, and the stop line at 25 feet.
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Have each child take a turn running the straight line without slowing
down. Instruct them to run to the first midpoint at 10 feet and stop.
Then have them start running again after they come to a complete stop at
the 10 foot spot to the 20 foot marking point. Next have them run from
the 20 foot marking point to the 25 foot stop line.
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The children will discover that each time they try to stop that their
feet may stop, but that their upper body will continue to move forward
for a period of time. This will especially happen when they try to stop
really fast.
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Discuss together with the children what they have experienced with
inertia.
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