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# Egg Drop Challenge

A physics project
by

## Sabawon Stanikzai

on 14 December 2013

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#### Transcript of Egg Drop Challenge

Created by Sabawon Stanikzai and Scott Benham
SPH3U
Braun
Dec. 2013
Super turtle
doesn't let any eggs break
(accept ours)
Materials
(actually our egg)
15 Straws
1 medium egg
2 index cards
Scissors
Initial Design
Pictures/ Videos
Calculations
Reflection
References
Rules
1) Students will work in groups of
two
.
2) The egg and structure
must
fall together.
3) The egg
cannot
be taped up to prevent cracking.
4) Do not
break
or
crack
Introduction
The height from the floor till the top of the bear pit is 3.6 meters.
The time it took our egg to hit the ground was 0.9 seconds.
Our initial design was completely based around crumple zone physics. The basic relationship between mass x velocity= impact force and how we can manipulate this relationship. By decreasing the time and speed or the mass its self, we can decrease the impact force. So we did this by making a cone shape so that when the structure dropped the cone would crumple and absorb the impact. we also punched straw through the cone in case the cone dropped on one of its side. We also added bits of cut up straws in the area of the egg just for extra cushioning
Straws on Top: egg won`t fall off from top.
Straws all around the Inside and Bottom: safety around the egg and crumple zone.
The end result wasn't great.

Cone Shape: for a big crumple zone.
Straws Sticking Out: crumple zone, in case it fall side way.
Calculation of Average Speed
Calculation of Speed of Impact
Calculation of Acceleration
Design Improvement
The acceleration of our egg add up to be 8.89 m/s/s.
Our egg is 0.91 m/s/s slower then the real acceleration of gravity (9.8 m/s/s).
Our egg was suppose to drop straight down but flipped and felt side way which increased the air resistance.
First let point out the positive:
The egg it self didn't fell out of our cone, when dropped.
Dropped on the plate form not the stairs.
The straws sticking out helped a little, by making it have a slower crumple zone at the side of our egg.

Now the negatives:
Our egg was expected to fall straight down but instead flipped and felled to it side.
The whole point of design was to make it fall straight down for a long crumple zone but the opposite happen.
If we just had a second run, we would of improve our egg structure big time. The number one reason why our egg broke, was it had to much weight at the top which led it to fall side way. If we had a chance to do this task another time, we would first distribute the weight of the egg over the whole structure, by putting it right in the middle.

Another improvement could be the shape of the structure. The cone shape structure was air dynamic which made it fall much faster. This made our egg get a bigger impact. Instead of wasting those straws and tape for nonsense on our structure; we could of traded for a cue card. We could of use the cue card for either a parachute or whirl gig on top of our structure. To have more surface area which made more air resistance.
Conclusion
Or
In Other Words
Egg Drop Challenge
The idea behind the egg drop challenge is to put us (students) in an engineering position and design a structure that's able to survive a large fall, while staying within a budget. Also to make a real world connection, like to the mars rover. We were to research the mars rover landing and the different between them and us.
Mars Rover
Cone Egg
Similarity
Cost around \$2.5 billion

7, 000 employers

Material: rocket, parachute, batteries, solar panels, aluminum alloy, aeroshell, cameras and many other materials.

Took years to design and construct

Took 8 months to land approximately 3, 000, 000 miles away

Mission Completed
Cost around \$5

2 students

Material: 15 Straws, 1 medium egg, 2 index cards,1 m of masking tape and Scissors

Took around 2 hours

Took 0.9 seconds to land 3.6 meters

Mission Failed

Furthermore our egg drop strategy was based on crumple zone physics and failed because the cone flipped and the shape itself made it accelerate faster to the ground. We agreed if we were able to improve our structure we wouldn't of wasted valuable material on minor details and would of spent them on a a parachute or worry gig. Unfortunately the structure turned and broke and therefore failed
objective was to make a structure/machine which would land an object safely to land.

Both use a crumple zone all around their structure/machine.

Research
1) "Mars Exploration Rover Mission: The Mission." Mars Exploration Rover Mission: The Mission. N.p., n.d. Web. 13 Dec. 2013.

<http://marsrover.nasa.gov/mission/spacecraft_edl_aeroshell.html>

2)Fox, Jon. "12 Crazy Facts About the Mars Rover." IGN. N.p., n.d. Web. 13 Dec. 2013.