p
m
u
J
e
e
g
n
u
B
Egg
hat the
e jump so t
e
g
n
u
b
a
n
Desig
s of the
hin 2 inche
it
w
s
p
o
t
!
s
egg
from 5 feet
d
e
p
p
o
r
d
floor when
eed
What You N
ings
• nylon stock
nds
• rubber ba
• balloons
• yarn
wich bag
• plastic sand
• pennies
• an egg
• newspaper
• ruler
,
nylon stockings
e
th
r
e
h
t
a
G
1
and yarn. Pull
Scoop
Engineering
e falling egg
p the egg, th
When you dro
s the cord
bungee cord. A
e
th
s
e
h
tc
stre
stops falling.
the egg until it
s
w
o
sl
it
s,
pulling
stretche
rings back,
sp
rd
co
ee
ng
Then the bu
ground.The
away from the
d
an
up
g
eg
e
th
it’s made from
tches because
re
st
rd
co
ee
bung
hings that
are elastic.T
materials that
their
rn almost to
tched
are elastic retu
ey’ve been stre
th
r
te
af
e
p
a
original sh
nt the bungee
force. The amou
a
by
ed
sh
ua
or sq
stic the
nds on how ela
pe
de
s
he
tc
re
weighs.
cord st
much the egg
w
ho
d
an
e
ar
materials
e to make a
als did you us
ri
te
a
m
t
ha
W
cord?
stretchy bungee
ZOOM
INTO
balloons,
y,
rubber bands,
ic, or stretch
t
s
la
e
w
o
h
each to test
s to
these material
se
u
n
e
h
.T
e
ar
they
e cord.
make a bunge
ith
a plastic bag w
ll
fi
:
g
g
e
t
s
e
same
2 Make a t
about the
until it weighs
pennies
.
as a real egg
h the test egg.
it
w
gn
si
e
d
e
ge
bun
3 Test your
st egg comes to
te
e
th
se
o
cl
w
Measure ho
the ground.
can
hat changes
.W
gn
si
e
d
r
u
yo
gn?
4 Evaluate
ur bungee desi
yo
ve
ro
p
im
you make to
r bungee design
u
yo
y
r
t
y,
ad
e re
5 When you’r
ns?
g.What happe
with a real eg
on
™
Did the egg stop within
2 inches of the floor? If not,
what could you change so
that it does? What happens
if you change the length
of the bungee cord? What
happens if you change how
you arrange the materials?
Or, what happens if you add
more weight to the egg?
Choose one thing to change
(that’s the variable) and
make a prediction.Then
test it and send your
results to ZOOM.
Sent i n by Rachel K. of Champaign, I L
ENGINEERING is a partnership of WGBH and National Engineers Week. National Engineers Week 2002 chairs: DuPont and the American Society
of Civil Engineers. ZOOM is produced by WGBH Boston. Funding for ZOOM is provided by the National Science Foundation, the Corporation for Public
Broadcasting, the Arthur Vining Davis Foundations, and public television viewers. Any opinions, findings, and conclusions or recommendations expressed in
this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.
pbskids.org/zoom
Engineer’s Notebook
Egg Bungee Jump
TM/© 2003 WGBH Educational Foundation.
My Prediction
What Happened
anted!
Engineers W elastic,
retchy, or
You can use st
lve all sorts of
materials to so
you ever
example, have
problems. For
nt them
nglasses and be
sat on your su
signed
gineers have de
En
e?
ap
sh
of
t
ou
this
etals to solve
memory m
ber”
metals “remem
problem.These
apes and return
their original sh
s like
atically. Engineer
m
to
au
em
th
to
sign new elastic
you could de
e future.
materials for th
OM !
Send It to ZOsults at
TM
re
Tell us about your
/sendit
om
zo
g/
pbskids.or