catapult physics & lab activity
DESCRIPTION
Catapult Physics & Lab Activity. Definitions. Force ( F ) : strength or power applied upon an object. F = mass * acceleration. Definitions. Mass ( m ) : the quantity of matter (atoms/particles) in the object - PowerPoint PPT PresentationTRANSCRIPT
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Catapult Physics
&Lab Activity
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• Force (F): strength or power applied upon an object.
F = mass * acceleration
Definitions
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• Mass (m): the quantity of matter (atoms/particles) in the object
• Gravity (g): the FORCE of attraction by which bodies tend to fall toward the center
Definitions
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With Air
Resistance
Definitions
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• Velocity (v): how far you go over a set amount of time (v = distance/time)
• Acceleration (a): “speeding up”
DefinitionsCAR 1
CAR 2
CAR 3
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• Angles (θ): the space within two lines (right)
Definitions• Tension: the
state of being stretched or strained. (left)
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•Projectile motion • refers to the motion of an object projected into the air at an angle.
Projectile Motion
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Examples: Projectiles in Motion
Long Jumper
Soccer Player
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Projectiles in Motion
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Projectiles In Motion
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Projectiles In Motion
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Without Gravity VS. With Gravity
Putting it All Together
Gravity is necessary to make a projectile land
back on the ground. The launching force and angle along with the mass of the
object help determine how far and how high the
projectile will fly
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3. What are 3 factors that will affect the
distance the projectile travels?
4. Describe how an object’s mass will
change the projectile’s distance traveled?
Questions
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Factors in Affect…What Happened?
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An object of the same mass and same angle is thrown faster and faster each time
Factors in Affect….What Happened?
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Answer Question 5
6. Describe how tension affects the projectile
motion?
7. Does mass effect velocity? Why or why not?
8. How are mass, velocity, and projectile
motion related?
Questions
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Objective: The projectiles in this activity are marshmallows. Design and build your catapult to launch the projectile a certain distance.
Remember to do some research to help you in the design process. Include sketches in your design plan, a list of materials you will use, and a data table you will record your results in.
I MUST approve your design plans before you will be allowed to begin construction.
Engineering Design: The Assignment
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Example Process
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What angle will you use to shoot your projectile?
What will create a force to launch the projectile?
What is the mass of the object being launched?
Things to Consider..
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Let’s go out to do a test run and collect our first set of data!
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Factors Affecting Distance Mass of object being hurled Strength & flexibility of arm Mass of arm Length of the arm How far the arm is pulled back Angle of base or release (best angle?)
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Possible Design Challenge #2Angry Birds – Making Your Catapults
AccurateMake your own data table to record how
many times your marshmallow hits the target.
Calculate your experimental probability. # of times it landed on target / total # of
launchesAre you accurate? Precise? Both?What variables affect the accuracy of your
catapult?
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Accuracy vs. Precision