TennisThe Forces that create this game!

Force (Top Spin)} Top-spin

brings the ball in a upward direction then gradually moves in downward direction } Top-spin is a consistent shot that will make the ball bounce in the court } To perform a top-spin shot you have to swing tennis racket in diagonal motion } Every tennis player uses top-spin

Forces exerting on the} The

ball used in this sport is the tennis ball } The main force exerting on the tennis ball is the contact between the racket and the tennis ball } Other forces exerting on the tennis ball are the gravitational pull and friction } There are only three major forces acting on the tennis ball

Description of Forceso

The earths natural gravitational intensity which pulls the ball down at 9.8 N/kg the force being applied from the racket hitting the ball in upward forward direction kinetic friction is acting on ball because the ball is not at rest

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Unbalanced or Balanced Forcestennis ball in a game will constantly accelerate and decelerate } Forces acting on the tennis ball are unbalanced which causes the acceleration and deceleration of the tennis ball } Acceleration starts when the ball has been hit and deceleration when force of gravity becomes more than the force applied } Three unbalanced forces that are acting on the ball are the force being applied to the ball, friction and gravitational pull} The

The Tennis Rackettennis racket is most essential equipment in tennis } Without this equipment you are not able to play tennis } Tennis rackets can vary in sizes } Each racket has different attributes

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Ex) power, control, comfort, durability, etc

Newtons Three Laws used in Tennis} Newtons first law A tennis player has to be always balanced when performing any type of shot

When an object is balanced that means that Fnet (sum of all forces) equals to 0 A tennis player can not lean towards the ball because the player has no time preparing for the shot A tennis player can not lean away from the ball because the player can not follow through his shot and will not get any power on his shot

Newtons Second Law} Newtons

Second Law

As a tennis player swings the racket towards the ball, the player accelerates at contact point The force applied is greater than the force of friction therefore causes unbalanced forces The formula fnet equals mass multiplied by acceleration you can find out the force you applied on the tennis ball or the mass of the racket

Newtons Second LawFnet=ma Expand it ! Fapp + Fk= mass x acceleration

Newtons Third Law} Newtons

Third Law

When there is an action there will also be a reaction An example is when a tennis player hits the ball with the racket, the racket exerts a forward force while the ball exerts a backward force For every action, there is an equal and opposite reaction.

(R & D)} Racket Improvement } A lighter material like aluminum } Greater flex-point to improve acceleration=power } A better grip so players will have more control and comfort } A bigger frame so player have a bigger sweet-spot } A granny stick to reduce vibration

How to Test it!}

you would measure the vibration on the racket several times force of the racket hitting the ball will be controlled by professional players testing it vary the acceleration of the ball & speed of the racket to adapt to different shot in the game}

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ie) slice, drop shot, forehand, backhand, lob, etc

Our Design is BetterMaterial } Tested by Roger Federer } Reduced vibration } Higher flex-point } Affordable price } Adapts to every hit you do} Lighter

Bibliography} }

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Ana Ivanovic [Video file]. (n.d.). Retrieved from http://www.youtube.com/ watch?v=2x6vqaDGgnI Dunlop Tennis racket. (n.d.). Retrieved from archives website: http://www.besportier.com/archives/dunlop-aerogel-300-tennisracquet.jpg "Newton's Three Laws." Newton's Three Laws. N.p., n.d. Web. 1 Nov. 2010. . Roger Federer [Video file]. (n.d.). Retrieved from http://www.youtube.com/ watch?v=L0L1L6Aqqwg Tennis picture. (n.d.). Retrieved from Wordpress website: http://anggun3.files.wordpress.com/2008/07/fedfore.jpg Waldo. N.d. The Buckeye Herps. Web. 1 Nov. 2010. .

The EndThanks for listening to our presentation!