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# The physics behind gymnastics

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on 23 April 2013

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#### Transcript of The physics behind gymnastics

References Gymnastics apparatus The physics behind gymnastics Kayla Ross uneven bars GYMNASTICS PHYSICS Angular momentum Friction Acceleration References: Centripetal force centripetal force which means the "center seeking force. In the case of uneven bars, an artistic gymnastic apparatus; the centripetal force is cause by the gymnast's grip on the bar, and the bar itself is the center seeking force ( pulled towards), causing her/he to revolve around the bar Angular momentum is equal to the product
of mass, velocity and distance from mass to
axis of rotation. Once a gymnast pushes off
the mat, they have all the angular momentum needed, this means no momentum is gained or lost. However the gymnast will be able to change the rate of rotation in order to perform different moves. If they pull their arms in, making their center of mass smaller, they will spin faster. Friction is a force that resist motion between bodies
in contact. The chalk used by the gymnast increases friction between the bars and the gymnast's hand.
Also, chalk helps the gymnast's hands to smoothly
glide over the bar, while providing enough friction for their hands to stick to the bar. One of the reasons being short is an admirable quality in the sport is because it allows the gymnast to revolve
faster. By separating her leg into a split, she is making he radius smaller, thus increasing her velocity. In order to perform tricks, she increases her speed from the mount and overcomes the force pulling down, gravity. "Artistic Gymnastics World Championships." N.p., n.d. Web. 03 Mar. 2013.
"Centripetal Force." Centripetal Force. N.p., n.d. Web. 14 Mar. 2013.
Physics Project. "Physics in Uneven Bars." Prezi.com. N.p., 11 Jan. 2011. Web. 14 Mar.
Eddie Pells, AP National Writer. "Liukin Wins Silver in Uneven Bars - USATODAY.com." Liukin Wins Silver in Uneven Bars - USATODAY.com. N.p., 9 Aug. 2007. Web. 14 Mar. 2013. BEHIND Angular momentum #equals the product of mass, velocity #and distance from mass to axis of rotation. When a gymnast leaves the mat, they have all the angular momentum from their push-off that they will get, none can be gained or lost. However, for various moves, the gymnast will need to change their rate of rotation while in the air. Well you may wonder how they can change their rate of rotation without pushing off on something? Well, they do this by changing the distance of their center of mass from the axis of rotation. The angular speed increases or decreases by changing the distance between the mass and the axis of rotation.
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