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# The Physics to Airhockey

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## yael berez

on 19 April 2017

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#### Transcript of The Physics to Airhockey

Average Speed
In order to calculate the average speed of the puck measure how much time it takes for it to reach from one side of the table to the other. Then use the equation velocity equals distance over time. (to find the distance measure from one side of the table to the other)
The Goal
the goal of air hockey is to make the puck go into the goal. The first oponent to score a certain number (usually 10) wins the game.
Velocity and Acceleration
The more acceleration that the puck has the higher its velocity, making it more likely to score. In order to increase acceleration increase the net force. To do so add more strength to your arm when hitting the puck with the paddle.
Friction
Friction is unwanted in the game of air hockey because if there was friction the puck wouldn't be able to slide on the table. In order to minimize the friction air is exerted to the top of the table. Its normal force keeps the puck afloat, allowing it to slide from one side of the table to the other. The bottom of the paddles, or pushers, are covered in a smooth cloth that also help in the reducing of friction.
Forces
Gravity
Gravity is the force acting against the air being pushed up from the table because it is pushing the puck down while the normal/applied force from the air is allowing the puck to remain afloat.
The Physics to Air Hockey
Where it takes place: A hockey table
Gravity
1st Law of Motion
"An abject at rest tends to remain at rest and an object in motion tends to remain in motion in the same speed and direction unless acted upon by an unbalanced force"
2nd Law of Motion
"Acceleration of an object depends on the object's mass and the net force acting upon it"
3rd Law of Motion
"Every action has an equal and opposite reaction"
The puck stays at a constant motion (when the table is turned on because of the air underneath it) until it is hit by the paddle. The paddle creates an unbalanced force causing the puck to move in the direction in which the force was exerted.
The harder you hit the puck the further it will go because by adding strength to your thrust the net force is being increased. The increased net force causes a boost in acceleration. This higher acceleration allows the object to reach a further distance in a shorter amount of time (increases velocity).
The third law can be seen in many situations, but is most evident when the puck hits the sides of the table because it then it bounces back in the opposite direction and keeps moving. It can also be seen after the puck is scored because when it falls through the goal you can see it hit the bottom then bounce back up a couple of times before staying on the ground, each time it bounces back its with less force.
Average Speed
The average speed can be controlled by the player if he or she learns to manipulate the acceleration. By adding or subtracting strength from when the puck is hit with the paddle an acceleration or deceleration is created because by changing the amount of strength you are changing the net force, a key component in the equation of acceleration. An acceleration would mean an increase in average speed while a deceleration would mean a decrease in the speed.
Managing Forces
Applied force: the player must control the applied force being exerted onto the puck. He or she must be aware of the direction of the force and be sure to aim towards the goal. The player must also add strength when applying force to the puck in order to increase accleration, and help ensure their score.
Air Ressistance: The air ressistance is caused by the applied force because as the puck moves in one direction the air pushes in the opposite direction, slowing it down.

Friction: the friction is being minimized by the air from the table and the cloth on the paddles (unwanted)
Normal Force: Exerted from the air comming from the table.
Gravity: pulling down on everythign.
Tension Force: there is no tension force needed in this sport.

Works Cited
White = forces player can control
Red = Forces player can't control or doesn't need to
Berezdivin, Y. (n.d.). Forces and Motion. In Physical Science Interactive Notebook (pp. 66-91).
Bishop, E. H. (2015, December 11). Air Hockey dun dun duhhhhhhhhhh by EV Heironimus-bishop on Prezi. Retrieved from https://prezi.com/-usgujkygbyj/air-hockey-dun-dun-duhhhhhhhhhh/