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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 Presentation
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Catapult Physics
&Lab Activity
• Force (F): strength or power applied upon an object.
F = mass * acceleration
Definitions
• 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
With Air
Resistance
Definitions
• 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
• Angles (θ): the space within two lines (right)
Definitions• Tension: the
state of being stretched or strained. (left)
•Projectile motion • refers to the motion of an object projected into the air at an angle.
Projectile Motion
Examples: Projectiles in Motion
Long Jumper
Soccer Player
Projectiles in Motion
Projectiles In Motion
Projectiles In Motion
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
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
Factors in Affect…What Happened?
An object of the same mass and same angle is thrown faster and faster each time
Factors in Affect….What Happened?
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
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
Example Process
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..
Let’s go out to do a test run and collect our first set of data!
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?)
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?
Accuracy vs. Precision