‚Äč Dance
By: Kaelamae Carlson

Introduction:
As you read through you learn how dancing isn't just about the moves and performances, you can also look at it as science. Dance is based upon Newton's 3 Laws of Motion. Each step, leap, and turn is due to what you will be reading.

Question

How does dance relate to Newton's Laws of Motion?


Research

Newton's First Law of Motion
Newton's First Law of Motion is an object in motion, stays in motion and an object at rest stays at rest unless acted upon by an unbalanced force. A dancer in motion will be stopped due to outside forces such as friction. While dancing, forces are acted on the body. If this were not to happen, a dancer could maintain a jump forever.


Newton's Second Law of Motion
Newton's Second Law of Motion is states that force equals mass times acceleration. The amount of force needed to accelerate is directly related to the mass of the object. The mass of a dancer has effect on the ability to dance. The ability to dance also depends on how you use the mass of your body. The body of the dancer will maintain more inertia if its mass is further from the axis it is rotating on than if it is closer to the body.

Newton's Third Law of Motion

Every action there is a reaction of equal magnitude in opposite direction. A dancer is involved in many poses which are motionless. The force of gravity pulling downward must cancel out the force moving upward from the floor to the foot of the dancer.
Friction is the rubbing of one object or surface against another. So in this case, the dancers photo is creating friction on the dance floor.
If it were not for friction and gravity, the dancers in this picture would fall to to floor.



external image 10029402_james_waltz_promenade_warwick_ivdc_competition_2008-600.jpg

Momentum is the product of the objetct's mass and velocitiy. In this case, the object is the dancer. For example, this girl in the video shows us a forte turn in dance. For her to do this she has to gain momentum using her arms and leg.


But what alot of, or all, dance moves need to take place is gravity and torque. Gravity is the only force acting on a dancer in mid-air. The dancers center is the gravity.

This video below shows how gravity is acting upon the dancer as she goes into a leap.


Resources

http://www.hep.uiuc.edu/home/g-gollin/dance/dance_physics.html#8
http://physicsofballet.homestead.com/newtonlaws.html
http://www.barranesclass.com/phys1090/circus/Anderson.html


Videos and Photos
http://www.reggie.net/photography_blog/2008/11/
http://www.youtube.com/watch?v=EixtGKNP6ok&feature=player_embedded
http://www.youtube.com/watch?v=q1XTpfSTIV4&feature=player_embedded