Gigo 1249R, Manual, Page: 74 / 80

73
B
rainstorming
B
rainstorming
The closest example from daily life, of how
a peacock opens his tail feathers, is the
folding fan. These fans are foldable and easy
to carry around. When using one, all you need to
do to open the fan is to push the bottom frame with your
hand. The frame acts as a lever, while the fan’s nail acts as
its pivot, allowing the surface of the fan to unfold. This makes the
frame of the fan fling out in an arc. Since the fan’s surface is attached
to the frame, its tension limits the frame’s range of movement. This
surface tensions causes each part of the surface to unfold, just like how a
peacock opens his tail.
Where else is the lever principle applied?
Daily
Application
Daily
Application
Tony and Grandpa Rudolph went to the zoo together. They saw a peacock,
which made a very attractive sound as he opened his beautiful tail feathers.
Grandpa Rudolph explained to Tony that the peacock normally hides his
colorful tail, but when mating season arrives, the male peacock will open up
his beautiful feathers in a fan-shape, displaying them for a peahen.
Additionally, male peacocks have many
eye-spotted tail feathers. Their purpose is
to intimidate enemies. When a peacock
faces a threat, he will open his tail feathers.
Confused by the number of “eyes”, the
enemy will retreat.
Kids, can you build a peacock?
19
Peacock
Scientific
Application
Lever and Gravity