# Rapunzel: A Problem-Based "Forces, Motion, and Energy" Unit for MS (PBL)

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Story: In the story of Rapunzel, climbing up her hair is the only way to enter her lonely tower. How long was Rapunzel’s hair? How high was the tower? Could Rapunzel’s hair really support the weight of the witch or the prince? Did Rapunzel suffer from horrible headaches? These (and others) are the questions you will need to answer as you sort fact from fiction in the tale of “Rapunzel”.

Objectives: The student knows force and motion are related to potential and kinetic energy. The student is expected to:

(A) compare and contrast potential and kinetic energy;

(B) identify and describe the changes in position, direction, and speed of an object when acted upon by unbalanced forces;

(C) calculate average speed using distance and time measurements;

(D) measure and graph changes in motion; and

(E) investigate how inclined planes can be used to change the amount of force to move an object.

In Texas, these are 6th grade science TEKS 8A-E.

Contents:

• Introduction… (Reading - Story of Rapunzel)
• Introduction (Projection-friendly version)
• Predictions
• Making a Model (Partner work - Students use a model of the tower to learn more about the scenario.)
• Finding the Rate (Partner work - Students determine the rate of Rapunzel's hair growth.)
• Speed (Calculation notes)
• Find Your Speed (Lab - Students measure distance and time to find speed.)
• Graphing Speed (Graphing notes)
• Speed Calculations and Graphing Practice (Independent Practice)
• Forces (Notes on balanced and unbalanced forces)
• Measuring Forces (Lab - Students determine the weight that one hair can hold before it breaks.)
• Using a Ramp (Lab - Students experiment to see how a simple machine could help relieve tension on Rapunzel's head.)
• Energy (Notes on Potential and Kinetic Energy with Graphic Organizer Activity)
• Energy, Forces, and Motion Practice (Independent Practice)
• The “True” Story (Students write their own version of the story's events.)
• Teacher Pages (Keys, teaching tips, lab prep)

Please see the Preview for the Introduction, Materials, and a Sample Activity.

Total Pages
46 pages
Answer Key
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Teaching Duration
1 Week
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