Balancing Acts pen or pencil scissors ruler clear tape markers. Balancing on a boat at sea can be difficult. Even after coming back to land, people may still feel a swaying or wobbling feeling.
Patients who experience this sensation for months or years are said to have Mal de Debarquement Syndrome. Parts of the inner ear, such as the utricle and saccule, help people stay balanced.
Discover which physics tricks some of the most skilled circus performers use in their acts. Find the scientific term for these tricks in this word search. Download the printable here. Check your answers here. What Will You Need? Fun Facts. Watch this experiment! Wind will affect how the pendulum swings.
Get help from a friend! Constant or variable practice: Recreating the especial skill effect. Acta Psychologica, 2 — Demey, S. Eubanks, A. Periodization training for acrobatic gymnastics. Technique, 29 5 — Garrett, W. Exercise and Sport Science. Gruber, M. Training-specific adaptations of H- and stretch reflexes in human soleus muscle. J Mot Behav, 39 1 — Kraemer, et al. American College of Sports Medicine position stand.
Progression models in resistance training for healthy adults. Med Sci Sports Exerc, 34 2 — Magill, R. A review of the contextual interference effect in motor skill acquisition. Human Movement Science, 9 3? McArdle, W. Exercise Physiology — Nutrition, Energy, and Human performance.
Lippincott Williams and Wilkins. National Strength and Conditioning Association Essentials of Strength Training and Conditioning — 3rd Edition.
Human Kinetics. Proteau, L. The effects of the amount and variability of practice on the learning of a multi-segmented motor task. In some cases the center of mass is a point in space outside the actual object. For example, the center of mass for a hula hoop is in its empty middle. Place the tip of your finger under the middle marshmallow and try to balance the structure on your finger. Can you balance it? Is it easy or difficult?
If you cannot balance it, move the middle marshmallow a bit to one side or the other until you find just the right spot that enables you to balance the structure with your finger.
We will call this spot the original balance point. Add one marshmallow to the end of each toothpick and connect the two new marshmallows with another skewer so you get a rectangular shape with a marshmallow on each corner and one marshmallow at the center of one skewer.
Is it easier or more difficult than balancing the simpler structure? If you cannot balance this rectangle, move the middle marshmallow a bit to one side or the other until you can. Is the structure completely horizontal, or is it tilted to one side? Rotate the paper your drawing is on so that it has the same angle as your actual structure. On your drawing, mark where your finger is with an "X" and draw a vertical line down from the X.
Is the structure hanging down completely vertically or is it tilted? Make an X where your finger is and draw a vertical line down from the X. Is the structure hanging down completely vertically, or is it tilted?
Where is the center of mass of your structure? Where is it in relationship to the middle marshmallow? On the middle marshmallow, use toothpicks to attach two more marshmallows, clustered near the middle one. Place your finger under the original balance point and try to balance it. Is it easier or more difficult than balancing the previous structure? Based on your new drawing, where is the center of mass of your new structure?
If it has changed, how has it changed?
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