In Motion GRASP Review SC6P121 Measure and graph distance versus time for an object moving at a constant speed Interpret this relationship 10 m5 s 2 ms 5 m10 s 5ms 0 m10 s 0ms ID: 587474
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Slide1
Rocketry
In
Motion
GRASPSlide2
Review:
SC.6.P.12.1
Measure and graph distance versus time for an object moving at a constant speed. Interpret this
relationship
. Slide3
10 m/5 s= 2 m/s
5 m/10 s= .5m/s
0
m/10 s= 0m/s
15 m/5 s= 3m/s
The answer is D!Slide4Slide5
5 km/ 5 min= 1 km/min
The answer is B!Slide6Slide7
500m/5 s= 100 m/s
350m/5 s= 70 m/s
200 m/2 s= 100 m/s then 0 m/s and then 100 m/s
250 m/5 s= 25 m/s
The answer is B!Slide8
Now do one yourself:
pg
. 84
Altitude:
40 meters
Time:
4 seconds
Speed: _________
In metersSlide9
GOAL:
To determine which number of fins will
enable the Viking Model Rocket to reach the highest altitude with the largest thrust (or fastest speed.)
Slide10
Role:
You
are a mechanical engineer that has been working on a new rocket design, and are hoping to get hired as a rocket scientist with the new organization called NASA.
Slide11
Audience:
The Board of Directors
at
NASASlide12
Situation:
It
is 1958 and
NASA has just been formed. American’s are excited that the first satellite is in space. NASA is looking to send a new type of rocket into space. They are calling this rocket, the VIKING rocket. You have been experimenting with the Vanguard Rocket design and are eager to launch your rocket, but you aren’t sure how many fins would be the most effective to create the greatest lift and the largest thrust. NASA has heard about all of your work in the engineering field and are wanting to recruit you to help them find which number of fins will be required to help them reach the highest altitude at the fastest speed so that they will be able to orbit the Earth! Obviously this is only a model and the real one NASA will be recreating will be made to go into Space!
Slide13
Product:
A
properly built Viking Model Rocket with either 3, 4, or 5 fins along with completed pre– and post–launch tasks.
Slide14
Watch this Brain Pop
video about Space FlightSlide15
Draw this in your
Lab books on page
85
Weight = the downward thrust that Earth’s Gravity exerts on all objects.
Drag= the resistance of air against anything that moves through it.
Thrust= any force that moves a rocket upward.Slide16
Parts of the Model Rocket
What does it do and what is its
function?
How does it apply to what we have learned?
Unbalanced Force
Balanced Force
Law of Gravity
Type of Forces:
Contact
Non-contact
Body Tube
Fin
Engine Mount
Engine
Ejection Charge
Recovery Wadding
Nose Cone
Streamer
Launch Lug
Shock Cord
Create Pre-launch task on
pg
86Slide17
Body
Tube
The body tube is the frame of the rocket. It contains an engine mount to hold the motor, and space for the recovery system.
The body tube helps keep the rocket balanced and
assisting in guiding the rocket through air resistance.
Slide18
Fin
The fins of the rocket provide aerodynamic stability in flight so that the rocket will fly straight.
The fins along
with other parts help the rocket resist the law of Gravity.Slide19
Engine Mount
The engine mount keeps the rocket motor from moving forward into the rocket body during the thrusting phase of the flight.
The engine mount is there to resist
against unbalanced forces. When the engine is thrusting forward, the mount resists. (Newton’s 1
st
and 3
rd
Laws)Slide20
Engine
The engine is what propels
the rocket forward and causes lift.
The engine is the example of Newton’s 3
rd
Law. When engine is ignited, thrust occurs which causes the rocket to lift in the opposite direction, against the Law of Gravity.Slide21
Ejection Charge
The ejection charge ignites the engine when sufficient electrical current is passed through it.
The thin wire heats, igniting the
pyrogen
, which then ignites the motor propellant.
The ejection charge is an example of Conservation of Energy. Electrical
energy converts into
thermal
energy which turns into kinetic energy.Slide22
Recovery Wadding
Recovery wadding is flame-resistant material that protects the streamer from the hot blast of the motor ejection charge.
The recovery wadding is there to resist
against contact forces. (
ie
. Fire)Slide23
Launch Lug
The launch lug is what allows the model rocket to slide along the rod
to guide the rocket through Gravity and assist with aerodynamics until the fins can control the rocket.
The launch lug helps create a balanced force
before takeoff.Slide24
Nose
Cone
The nose cone of the rocket has a shape that causes the air to flow smoothly around the rocket.
The nose cone is specifically designed
to help with thrust as the rocket is going against the Law of GravitySlide25
Streamer
All
rockets require a recovery system to slow their descent and return them safely to the ground.
The streamer is there to create drag against the Law of Gravity
once the rocket has reached it’s highest altitude.Slide26
Shock Cord
The shock cord holds the parts of the rocket together after they separate at ejection.
The shock cord is an example of Newton’s 3
rd
Law, when the nose cone pops off, the shock cord brings it back.Slide27
Now you are
ready to build!!!