Zip Line PhysicsA Challenge Based Design Unit
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Transcript Zip Line PhysicsA Challenge Based Design Unit
Zip Line Physics
A Challenge Based Design Unit
Curt Blimline
Williamsburg High School
CEEMS is funded by the National
Science Foundation, grant # 1102990.
Big Idea
Human Safety
• While transporting humans and cargo
• During relaxation and enjoyment experiences
Essential Question
What factors contribute to
the safety and enjoyment
of zip line rides?
The Challenge
Design a zip ride trolley system
with a braking mechanism that
delivers a safe and smooth ride
on a test zip line.
Guiding Questions
1. What are the components of a zip line system?
2. What are zip lines used for?
3. What design characteristics contribute to the
smoothness of the ride?
4. How do you brake a zip line trolley?
Guiding Questions
5. How do you determine the safety of your
design?
6. What forces exist in zip lines?
7. How does friction affect the design of a zip
line?
ACS
A (real world Application) – Safe and healthy physical
activities
C (career connections) – Careers affected include
mechanical, structural, and materials engineering
S (societal impact) – Safe zip lines creates healthy
exercise alternatives as well as effective cargo
transportation for remotely accessible areas
Standards
ONLS
Air Resistance and Drag
Friction
Forces in two dimensions
Adding vector forces
Motion down inclines
NGSS
HS-PS2-1.
HS-ETS1-2.
HS-ETS1-3.
Standards
Analyze data to support the claim that Newton’s
second law of motion describes the mathematical
relationship among the net force on a macroscopic
object, its mass, and its acceleration.
Design a solution to a complex real-world problem by
breaking it down into smaller, more manageable
problems that can be solved through engineering.
Evaluate a solution to a complex real-world problem
based on prioritized criteria and trade-offs that
account for a range of constraints, including cost,
safety, reliability, and aesthetics as well as possible
social, cultural, and environmental impacts.
Academic Content
Lesson 1 – Zip Line Basics – the fundamental physics
concepts in zip lines
Activity 1 – Zip and Deliver – an introduction to
engineering design through an activity on
zip line design
Activity 2 – Zoom Zoom – investigating the forces
experienced on zip lines
Academic Content
Lesson 2
– Zip Line Design Project –zip line trolley
system design
Activity 3 – Zip Stop – designing a rating system for
zip line braking mechanisms
Activity 4 – Zip Ride – designing a safe zip line trolley
system with a braking mechanism
Zip Line Design
Project
Engineering Design
Vector Resolution in Physics
Addition of Vectors (1+2+3)
Vector
Vector 1
Vector 2
Vector 3
Resultant
magnitude
angle x-component y-component
20.0000 30.0000
17.3205
10.0000
30.0000 60.0000
15.0000
25.9808
40.0000 120.0000
-20.0000
34.6410
71.6884 80.1039
12.3205
70.6218
MatLab Code
Automates this process
Graphs the individual vectors
Graphs the individual vectors as if they
were graphed individually (head to tail
method) as well as the resultant vector
MatLab Graphs
MatLab Command Window Results
Resources
1. http://adventure.howstuffworks.com/zip-line1.htm
2. http://www.ziplinerider.com
3. http://www.acctinfo.org/