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Air Resistance

TechYes project for science :)
by

Alyssa Guthrie

on 25 May 2011

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Transcript of Air Resistance

Air Resistance by Alyssa Guthrie Air resistance is the opposite of gravity. It is the upward pull on an object. It is the result of an object plowing with air molecules. The more air molecules the object collides with, the more air resistance. Air resistance depends on falling speed and surface area. Which will fall faster??? An elephant has more surface area than a feather, so wouldn't it fall slower? This is because the elephant weighs more, so gravity has a stronger pull on it. Once the upward and downward pull of gravity on an object are equal it has terminal velocity. This is the final velocity and objects will continue to fall to the ground with it. The elephant has a greater terminal velocity than the feather so it accelerates for a longer time. The elephants never reaches terminal velocity, so it continues to accelerate. The feather, however does reach terminal velocity. In conclusion, the elephant falls faster so it never stops accelerating, however the feather quickly reacher terminal velocity so it has a small terminal velocity. Bibliography http://images.sciencedaily.com
http://www.photl.com
http://www.physicsclassroom.com
http://www.physics.wustl.edu
http://surveymonkey.com
http://www.familyvacationcentral.com
http://a57.foxnews.com
http://static.guim.co.uk
http://library.thinkquest.org
http://www.healthwriting.com
http://web.nestucca.k12.or.us
http://3.bp.blogspot.com
http://www.slrphotographyguide.com
http://www.ski-rent.net Air resistance is the opposite of gravity. It is the upward pull on an object. It is the result of an object plowing with air molecules. The more air molecules the object collides with, the more air resistance. Air resistance depends on falling speed and surface area. So it everything falls at the same speed,
what is that speed? Everything falls at 9.8 meters
per second per or 9.8 meters Newton's Laws of Motion Newton's first law: An object at rest stays at rest
or an object in motion stays in motion in the same
direction at the same speed unless acted upon by an
unbalanced force. Newton's second law: The greater the force
applied to an object, the more the objects will
accelerate. It takes more force to accelerate
and objects with a lot of mass than to
accelerate something will very little mass. Newton's third law: For every action force applied to an object,
there is an equal and opposite reaction force. On Earth, objects fall at 9.8 m/s/s
What about on other planets??? Mercury: 3.7m/s/s
Venus: 8.7 m/s/s
Mars: 3.8 m/s/s
Jupiter: 23.12 m/s/s
Saturn: 8.96 m/s/s
Uranus: 8.69 m/s/s
Neptune: 430 in/s/s My Experiment: Question: If I drop a small paperclip and a piece of printer paper which will hit the ground first? Hypothesis: I predict that the peper clip will hit the ground first because the paper has air resistance. Procedure: 1. Drop the paperclip from one meter high. Record the time on a stopwatch.
2. Repeat step 1 two times and calculate the average.
3. Drop the paper from one meter high. Record the time on a stopwatch.
4. Repeat step 3 and calculate the avrage.
5. Draw a conclusion. Data: Air Resistance Pictures: Paper Clip:
Trial 1: .471 seconds
Trial 2: .337 seconds
Trial 3: .39 seconds
Avrage: .4 seconds
Paper:
Trial 1: 2.196 seconds
Trial 2: 1.583 seconds
Trial 3: 1.312 seconds
Avrage: 1.7 seconds Conclusion My hypothesis was correct, the paper clip fell faster than the paper. The avrage time for the paper clip was .4 seconds, and the avrage time for the paper was 1.7 seconds. This is becase the paper had more air resistance than the paper clip.
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