S Spaeth's List: Next Gen Sci Stds via Circus & Unicycling

• Plan and conduct an investigation to compare the effects of different strengths or different directions of pushes and pulls on the motion of an object.

• Plan and conduct an investigation to provide evidence of the effects of   balanced and unbalanced forces on the motion of an object.

  • How much force to apply to pedal to keep balanced. Consequences of letting the forces become unbalanced.
    
    Can we measure the required force with a simple spring balance and then cut the string to see the consequences?
• Make observations and/or measurements  of an object’s motion   to provide evidence  that a pattern can be used to predict  future motion.

  • Essential idea behind skilled juggling. Learn where the ball will be from observations about trajectory patterns.
    
    
    
    Tracker studies of axle motion for an idling giraffe unicyclist? Solves the issue of regular transit of near foot and ankle in front of the point of interest (the axle).
    
    The vertical filming of a giraffe rider naturally turns into a rotated image in tracker (at least for EC's ride analyzed via Xuggle). Then the analysis can start just with trailing points. After a couple of cycles, they overlap and it becomes difficult to see the pattern. So, the Tracker user can choose frame number or time to spread out the points. Voila: sinusoidal patterns similar to patterns from unicycle wobble on wet pavement.
• Clarification Statement: Examples of motion with a predictable pattern could include a child swinging in a swing, a ball rolling back and forth in a bowl, and two children on a see-saw.
• Ask questions to determine  cause and effect relationships  of electric or magnetic interactions between two objects not in contact with each other.

  • How can electricity activate a reed switch?

  • How close does a magnet need to be to close a reed relay to count rotations of a wheel?
• Define a simple design problem  that can be solved by applying scientific ideas  about magnets.

  • How would you count single revolutions of a wheel; partial revolutions of a wheel (as in stationary)?

3 more annotations...

• Develop a model of waves to describe patterns in terms of amplitude and wavelength and that waves can cause objects to move.

  • Riding a unicycle down a hill while dribbling water onto the tire to leave a trace of a wave.
• Develop a model to describe that light reflecting from objects and entering the eye allows objects to be seen

  • Use reflectance from spokes or reflective surface to detect counts for rotations.
• Generate and compare multiple solutions that use patterns to transfer information.

  • Compare magnet/reed, baseball card ratchet, light reflection, optical encoder and others for monitoring unicycle motion.

1 more annotation...

• Support an argument that the gravitational force exerted by Earth on objects is directed down.

  • Learning to unicycle requires rich understanding of responding to the influence of gravity.

  • The conversions of potential to kinetic energy and back again that a unicyclist controls work against the force of gravity.

• Plan an investigation to provide evidence that the change in an object’s motion depends on the sum of the forces on the object and the mass of the object.

  • Spiral back to the influence of balanced and unbalanced forces on motion of a unicycle. Adds algebraic thinking and some quantitative analysis.

• The mission of each eCYBERMISSION Team is to solve a problem in its community with speed, velocity, acceleration, vectors and scalars. Teams must research, hypothesize, experiment and use Science, Technology, Engineering or Mathematics (STEM) to help solve a problem by using forces and motion.