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The Physics of Archery

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by

William Gonzalez

on 19 December 2012

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Transcript of The Physics of Archery

HISTORY Archery was invented by prehistoric people, as a way to hunt from a distance. Ancient Egyptians were the first recorded people to use
a bow and arrow. The tools were later used in warfare, the use of the two tools can be go as far back as
500 B.C. The Physics of Archery HOW ITS PLAYED ( General rules for archery).
Archers are given a certain amount of time (1-3 minutes) and are a certain distance (18 - 25 meters) away from their designated target. ( In the Summer Olympics they are 70 meters away from their target!) They have to shoot all their given arrows (no more than six) as quickly and accurately as possible to the center of their
target. TYPES OF FRICTION Sliding friction and fluid friction
are involved in archery. Sliding friction is involved when the
bowstring is pulled it makes the arrow slide up against a part of the bow. When the arrow is released fluid friction comes to play. When the arrow is released from the bow it goes through a gas (the gas being air). (If you include an archers feet being up against the ground, static friction is involved as well. Static Friction fluid friction The bow string is being pulled towards the archer so the force acting against the string goes away from the archer. TYPES OF FRICTION The arrow is going towards the target, the
force acting against the arrow is pushing it
in the opposite direction. TYPES OF FRICTION FORCES AT WORK g
r
a
v
i
t
y n
o
r
m
a
l

f
o
r
c
e static friction sliding friction fluid friction NEWTON'S FIRST LAW
INVOLVING ARCHERY When an object that is at rest it tends to stay at rest, unless
acted upon by an outside force. When the arrow is knocked on
the bowstring (attached to the bowstring) and pulled towards
the archer it will remain that
way till an out side comes upon it and moves it - the archer letting
go of the bowstring. Knocked arrow. NEWTON'S SECOND LAW OF MOTION INVOLVING ARCHERY Although an arrow is small in its diameter it all comes down to the amount of force that the arrow collected from the archer's arm when
the bowstring was pulled. The transfer
of energy from from arm to arrow is called "kinetic energy." How far back the arrow and the bowstring is pulled will determine how fast and how far the arrow will go. NEWTON'S THIRD LAW OF MOTION INVOLVING ARCHERY "For every action there is an
equal and opposite reaction," applies to archery because
when an arrow is released
from the bow our body moves
backwards - slightly - but
since we weigh much more
than the arrow we don't feel
the effect that is caused by the action. HOW I WHOULD IMPROVE ARCHERY Its called the Archery Paradox. Since arrows are placed on either side of a bow it is never alined where the archer wants the arrow to hit the target. Despite this, the arrow seems to aline itself in mid air. i wouldn't make a change to the game or equipment but i would build a prototype bow that has a circular slit cut out of it in the middle of the bow. This would allow you to see if a shot arrow will aline itself in mid-air when launched from the middle of a bow, not from the side. The slit would be carved directly above where one hand is placed to hold the bow.   BIBLIOGRAPHY 1) "The World" book encyclopedia 2006
2) https:// www.archery-central.co.uk.
3)http://www.real- world- physics problems.com/
physics- of archery.html
4) All pictures shown on presentation came from Google Images.
By William Gonzalez
Period 5
Full transcript