Center of Mass and Center of Pressure: Engineering a …learningcenter.nsta.org/products/...EngineeringaStableRocket_6-4...Engineering a Stable Rocket ... • Tools to plan and document

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June 4, 2013

6:30 p.m. – 8:00 p.m. Eastern time

Center of Mass and Center of Pressure:

Engineering a Stable Rocket

Presented by: Marti Phipps

http://learningcenter.nsta.org

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Introducing today’s presenter…

Introducing today’s presenters

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Marti Phipps NASA Explorer Schools Education Specialist

Jet Propulsion Laboratory

Pasadena, CA

explorerschools.nasa.gov

From the Rockets Educator Guide


Are you a participant of

NASA Explorer Schools?

✔ Yes ✖ No



Classroom videos

Presentation slides

Links to NASA sites

Related activities

Where are you with the NGSS?

Type your thoughts on the screen.

1.

2.

3.


GRADE LEVEL

6 - 8


Outline

The NASA Connection

Navigating the Activity

Building a Rocket and a Launcher

STEM Concepts

Additional Resources








Let’s Pause for

Questions

Please type your

questions in the chat!



Which civilization is credited

with the first recorded use of

rocket propulsion?

A. Chinese

B. Russian

C. Greek

D. German




rocket propulsion?

A. Chinese

B. Russian

C. Greek

D. German




rocket propulsion?

A. Chinese

B. Russian

C. Greek

D. German




rocket propulsion?

A. Chinese

B. Russian

C. Greek

D. German


A P

ic

to

ria

l H

isto

ry


To

C

urre

nt D

ay

an

d B

eyo

nd

…


Ap

plyin

g N

ew

to

n’s L

aw

s


MS. Forces and Interactions Performance Expectations

MS-PS2-2: Planning an investigation to provide evidence that the change in an object’s motion depends on the sum

of the forces on the object and the mass of the object.

Science and Engineering Practices Disciplinary Core Ideas Crosscutting Concepts

• Asking questions and defining

problems.

• Planning and carrying out

investigations.

• Constructing explanations and

designing solutions.

PS2.A: Forces and motion Influence of science engineering and

technology on society and the natural

world.

Dimensions

Center of Mass and Center of Pressure: Engineering a Stable Rocket


MS. Engineering Design Performance Expectations

MS-ETS1.1: Define the criteria and constraints of a design problem with sufficient precision to ensure a successful

solution.

MS-ETS1-2: Evaluate competing design solutions using a systematic process to determine how well they meet the

criteria and constraints of the problem.

MS-ETS1-3: Analyze data from the tests to determine similarities and difference among several design solutions to

identify the best characteristics of each.


• Asking Questions and Defining

Problems

• Analyzing and Interpreting Data

• Engaging in Argument from

Evidence

ETS1.A: Defining and Delimiting

Engineering Problems

ETS1.B: Developing Possible

Solutions

ETS1.C: Optimizing the Design

Solution

Influence of Science, Engineering,

and Technology on Society and the

Natural World

Dimensions



Te

ach

er P

ag

es


Stu

de

nt P

ag

es


Ca

lc

ulatin

g A

re

a


Let’s Pause for

Questions

Please type your



LAB

SAFETY



Po

p! R

ocke

t L

au

nch

er

Minimal cost

Easy to assemble and use

Parts at plumbing or

hardware stores


Sh

op

pin

g a

nd A

ssem

bly


MS. Forces and Interactions Performance Expectations

MS-PS2-2: Planning an investigation to provide evidence that the change in an object’s motion depends on the sum

of the forces on the object and the mass of the object.


• Asking questions and defining

problems.

• Planning and carrying out

investigations.

• Constructing explanations and

designing solutions.

PS2.A: Forces and motion Influence of science engineering and

technology on society and the natural

world.

Dimensions



MS. Engineering Design Performance Expectations

MS-ETS1.1: Define the criteria and constraints of a design problem with sufficient precision to ensure a successful

solution.

MS-ETS1-2: Evaluate competing design solutions using a systematic process to determine how well they meet the

criteria and constraints of the problem.

MS-ETS1-3: Analyze data from the tests to determine similarities and difference among several design solutions to

identify the best characteristics of each.


• Asking Questions and Defining

Problems

• Analyzing and Interpreting Data

• Engaging in Argument from

Evidence

ETS1.A: Defining and Delimiting

Engineering Problems

ETS1.B: Developing Possible

Solutions

ETS1.C: Optimizing the Design

Solution

Influence of Science, Engineering,

and Technology on Society and the

Natural World

Dimensions



Class Discussions


Asse

mb

ly


What qualifies a

successful launch?

How can this lesson cover

NGSS?

Type your thoughts on the screen.

1.

2.

3.


Let’s Pause for

Questions

Please type your



Design

Build

Test Record

Data

Analyze Results Engineering

Design

Process


Video Series: Science

Project


Fo

rc

es o

n a

R

ocke

t

weight

thrust

drag

lift


Ro

cke

t S

ta

bility

center of pressure

center of gravity


x

For simple shapes:

Balance the rocket from a string or on an edge such as your finger or a meter stick

Finding Center of Gravity


For more complex shapes:

Hang the rocket from some point

Drop a plumb line from that point

Draw line on rocket along string

Repeat from another point

Find the point of intersection

Finding Center of Gravity


x

Trace the shape of the

rocket on cardboard

Cut out the shape

Determine the balance point

Finding Center of Pressure


Mathematical Approximation

Center of Gravity

df

db

dn


Mathematical Approximation

Center of Pressure

df

db

dn


Let’s Pause for

Questions

Please type your




Ro

cke

tM

od

ele

r III


Ro

cke

t W

in

d T

un

ne

l


La

un

ch

A

ltitu

de

T

ra

cke

r


Ad

ditio

na

l E

xp

lo

ratio

ns

Calculating Altitude


Ad

va

nc

ed

H

ig

h-P

ow

er

Pa

pe

r R

ocke

ts


Foam Rockets

Objective:

Rocket Stability

Trajectory

Description:

Construct rockets to

investigate the relationship

between launch angle and

range



http:explorerschools.nasa.gov

Thanks to today’s presenter!

Introducing today’s presenters

Marti Phipps NASA Explorer Schools Education Specialist

Jet Propulsion Laboratory

Pasadena, CA

63

Thank you to the sponsor of

tonight’s web seminar:

This web seminar contains information about programs, products, and services

offered by third parties, as well as links to third-party websites. The presence of

a listing or such information does not constitute an endorsement by NSTA of a

particular company or organization, or its programs, products, or services.

Thank you to the sponsor of tonight’s web seminar—1 of 6

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Thank you to NSTA administration—2 of 6

National Science Teachers Association

David Evans, Ph.D., Executive Director

NSTA Web Seminar Team

Al Byers, Ph.D., Assistant Executive Director, e-Learning and Government Partnerships

Brynn Slate, Manager, Web Seminars, Online Short Courses, and Symposia

Jeff Layman, Technical Coordinator, Web Seminars, SciGuides, and Help Desk

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Center of Mass and Center of Pressure: Engineering a …learningcenter.nsta.org/products/...EngineeringaStableRocket_6-4...Engineering a Stable Rocket ... • Tools to plan and document