Science Camp (Physics)
Part 3 : Project (Paper chair)
Presented by :
Li Man-long and Lai Chung-sum
Reasons for choosing this topic
• Paper chair is a challenging option to
choose.
• Although paper is soft material, we still
can use it for holding some heavy objects.
• There are many physical theories contain
inside.
• After the discussion between us and other
group, we want to have the same topic,
hence can compete with other.
Planning / design
• Material: wasted card boxes , scissors,
cutters, sticky tapes.
• Location: school and campsite
• Budget: 2 rows of sticky tapes----$10
• Procedure:
1. Cut down the card boxes into pieces by
cutters and scissors.
2. Sticky tape is used for sticking papers
into different shapes or different part of
the chair.
Data collection and analysis
Sample one
First model
Base of first model: 5
paper cylinders
Data collection and analysis
Sample one
Second stage of model: 4
paper triangle
Result of sitting a man on chair
is that the chair is collapsed
Data collection and analysis
Sample one
• Failure : The base of the model is
collapsed. There is no enough support
on the center part of chair and the
length of 5 cylinders are not same
• Improvement :Add one more cylinder
at the base, and make all cylinders
have equal length.
• Result: The chair is still collapsed.
Improvement
• Use a harder card to replace paper.
• Not build too high for the chair which
can make the chair not easily to
collapsed.
• Make sure there is no any clipped line
on the paper.
Conclusion
• 5 circle-shaped cylinders can only give out
a few support as they placed away from
each other. Furthermore, every cylinders
cannot share equal fore acting on it. So it
is not a suitable option.
• 4 triangle-shaped cylinders can give out
lots of support. It is because they cover
more surface area when the force acting
on it. so they can hold on more
pressure ,according to the pressure law
(Pressure = force / area)
• Shorter stand can burden more pressure.