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Hypothesis: As the wingspan of the paper helicopter increases, so does the average velocity of the helicopter, as it falls.
Independent variable: total wing length (cm)
Dependent variable: velocity (cm/s)

Controlled variables: material, width of wings, height of the drop (2 meters), weight of base, length of base

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Include a description of your lab.  Question, variables.

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Include a description of your lab.  Question, variables.

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Use the various options here in  Padlet to present your data to the class. 

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Use the various options here in  Padlet to present your data to the class. 

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Do need calculations? What is the answer to your question? Explain how you know this

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Jack:
How does altering the mass of the helicopter change the velocity?
Independent variable: Mass
Dependent variable: Velocity (m/s)
Controlled variable: Height(m)

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Andre:
The lab measured the amount of spins the helicopter did from 1 meter high up before hitting the ground

Independent variable: The length of the wing (cm)
Dependent variable:  The amount of spins the helicopter does before hitting the ground (from 1 meter high up)
Controlled Variable: Starting height Weight of paperclip

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The lab measured the time it took for the helicopter to descend when the length of the helicopter blades was changed.
Independent variable: Length (cm) of helicopter blades
Dependent variable: Time (seconds) it takes for the helicopter to reach the ground
Controlled variable: Weight of the paperclip, distance from the ground.

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Does the helicopter's wingspan affect the speed of its descent?
Independent Variable: Wingspan (cm)
Dependent Variable: Speed of descent (cm/s)
Controlled variable: Material of paperclip, starting height

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Does increasing the length of the propellers increase the time it takes to get to the floor?
Independent variable:
length of the propellers (cm)
Dependent variable:
Time it takes the helicopter to get to the ground (s)
Controlled variable:
Height (m)

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Jack:
Height: 0.7m

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Length of wings and time

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Claim: The wingspan of the handmade helicopter does increase the velocity of the helicopter as it falls, but only to a certain point until the materials of the helicopter fail, in which case the helicopter would drop rather rapidly.

Reasoning: The increase of increase of time in the air corresponding to the wingspan is to be expected (surface area, air resistance, etc). That the helicopter would fail when the wingspan became too long is reasonable too. This is mostly due to the physical constraints of paper, and both its length and its thickness; the wings could not keep at 90° because there was too much force pushing up the wings (air resistance) and too much force  pushing down the base of the helicopter (weight of paper + tape + weight of coin). Of course, it must be kept in mind that as the wing length increase, so does the total weight of the helicopter, so that might be a factor too.

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Chetan:
what affects will making the size of the helicopter much bigger have on the RPM of the helicopter

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Jack
Time/Velocity vs mass:

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claim: How dose the size of the blade length impact the time it takes to fall? if the length is smaller dose that take time off the fall or increase it.
reasoning: Looking through data  the smaller the length the less time it takes to fall, with the blade length of 4 cm it took 0.48 seconds to hit the ground but with the blade length of 7.5 it took 0.73 second to hit the grown. that shows with smaller blades the helicopter falls faster than bigger blades.

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Ryan  The lab measured the effect of mass (x) on the paper helicopter's flight time (y)
independent variable =mass (g)
dependent variable = flighttime (s)
control: height, atmospheric pressure
Hypothesis = An increase in mass will reduce the flight time (y)

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Height: 1.8 meters
Wing length(cm).   Time(sec)
First test:
4.5 cm.   1.1s
9    cm 1.6 s
Second test:
4.5cm  1.3s
9 cm  1.8s
Third test:
4.5 cm 1.3s
9cm 1.7s

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Ryan
Lab Results: (CLAIM)
An increase in mass reduces the paper helicopter's flight time

TITLE: Flight Time of Paper helicopter with varying amounts of mass dropped from 1 meter

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Shreya:
Data table on the effect of wingspan on a paper helicopter

Wingspan | Time taken | Distance

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Big      Small
Height         3 ft       3ft
Time            2.64s   2.86s
rotations     2.5        7.5
size           5.3 0.6

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Hannah:
Height: 179cm
Time:

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Jack:

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Jack:
Claim: increasing the mass of the helicopter increases the velocity.
Reasoning: The more mass the helicopter has, the more energy it has therefore increasing the velocity and decreasing the time it takes to reach the ground.

1 paper clip

v=0.7m/0.8s

v=0.875 m/s

2 paper clip

v=0.7m/0.7s

v=1 m/s

3 paper clips

v= 0.7m/0.6s

v=1.667 m/s

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Photos of the helicopter blades

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Create a new document and edit with others at the same time -- from your computer, phone or tablet. Get stuff done with or without an internet connection. Use Docs to edit Word files. Free from Google.

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Ryan
Reasoning: A greater mass will result in a greater gravitional pull.  The gravitational force acts down upon the object, and between the 5g and 12g helicopter, the 12g helicopter has a greater gravitational pull,
117.6N>49N

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Claim: If you increase the length of the propellers, then it takes longer for the helicopter to get to the floor.

Reasoning: Longer proppellers would increase the air friction which makes the helicopter take longer to fall. In our testing when the longer the helicopters proppellers were the more time it too for the helicopter to reach the ground.

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usually indep variable (X axis)
dep variable (Y axis)

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Josh: Having a larger wingspan will slow down the descent of the object.

This is because more drag will be created by adding more surface area. This is also seen in real life, where parachutes are used to create drag and slow down the object. Thanks to this drag, the time it takes to descend is slower, and as a result, the speed of descent is slower.

Shreya
Claim: The larger the wingspan of the helicopter, the more time it takes to come down.
Reasoning: In the data taken as the wing length increased the time it took to come down was more. When the wingspan was 6cm it took 1.06secs however, when it was 8cm it took 1.12 secs. Although this may not seem as a drastic increase it did  take more time. The wingspan also affected the speed due to the amount of time it took. Over time since the time increased, the speed was slower.

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Shreya:

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ryan - graph
short analysis: As expected, the flight time decreases as the mass increases. The line is not straight which means that the data points do not share a linear relationship.

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Claim: if you increase the size of the helicopter the rpm will be less

Reasoning: The bigger the helicopter, the more mass it h as, which drags it down creating more friction and less spinnng. It is also because the "propellers" are

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*best fit graph, does not absolutely present data accurately