Research Question: to investigate the relationship between distance and angle in all 3 projectile cases using an Angry Bird game.

List of controlled variables to minimize % error:

Bird Height (of catapult) Floor experiment was performed on

List Dependent:

Angle

List Independent:

Distance final

Hypothesis: using the following launch velocity formula;

Vave= velocity/time

The angles required to hit all 3 pigs are listed below:

60°, 45°, 50°

Materials:

Zinc Corner Brace Safety goggles Face mask 1 thick/wide piece of plywood 1 thick/skinny piece of plywood 1 mouse/rat trap 2 five pound isolated dumbbell weight Jar lid Duct tape Power drill Tape measurer Paper Logger Pro and software on iPad Protractor Another human being

Procedure:

Catapult Building:

1. Wear safety gloves and face mask and only use power tools if have pervious knowledge on how to use

2. Get a mousetrap and piece of plywood 3. Take a drill and nail and drill mousetrap trap into plywood4. Remove everything on mousetrap but platform, hammer, and spring5. Take the zinc corner brace and drill it onto the side of the mousetrap that the hammer will

fall6. Drill the jar lid onto a small piece of plywood (this will be called the arm)7. Duct tape the arm onto the side of the hammer going away from its end. Do this lid

facing brace.8. Duct tape weights onto each end of catapult9. Hot glue protractor onto 10. Put away all tools and make sure catapult is put away from the reach of smaller children

Vi Calculations:

1. Find another human being 2. Put safety glasses on3. Force other human to each launch catapult or film4. Place catapult on clear floor5. Point the catapult in a safe place for launch away from people, animals, or breakables6. Launch the bird (bouncing ball) at the different angles and film using the Video

physics app. Make sure that this set is repeated multiple times for each angle7. Use the software to graph the velocities and the acceleration rate 8. Put away all equipment and make sure catapult is put away from the reach of smaller

childrenAngry Birds Game Setup:

1. Do math to find the dx2. Set up pigs and catapults using measuring tape3. Launch and film at different theoretical distances 4. Clean after

D-t graphs:

Slope/Vinst (m/s)1 (60°) 2143 2 (45°) 2.83 (50°) 1833

Vx-T graph:

Slope/Vx (m/s) Comments1 (60°) 1666.7 Lower than the d-t slope by less than one percent. 2 (45°) 10.290 About five times higher than the Vinst. Very different then the first

difference because higher not lower.3 (50°) 174.00 Lower than the Vinst. Shows that there probably was an error in

the second calculation somewhere. Redid the math could not find an error. Wishing I could zoom into the graph more but do not have Graphical at home.

Average 617.00 Lower then both the Vinst of 50° and 60°. Shows that some speed must have been lost somewhere. Air resistance is acting on the bird.

Vy-t:

Slope/ag (m/s2) Comments1 (60°) -15000 Negative making it different from the other calculations. Lowest

amount of time2 (45°) 8.1633 Lowest as usual. Seems that the lower the angle the less distance

it travels.3 (50°) 6400.0 This is also a positive number and yet it goes downward. Average -2863.9 The data was inconsistent. I wish that I could redo this

experiment and film for longer because the data does go down but unlike the first graph it was not filmed long enough so that the number could become negative.

Calculate launch velocity (including angle) required to:

(a) Hit a pig target at dx = 1.3, dy = 0.0mVelocity Initial= 3.5 m/s

(b) Hit a pig target at dx = 1.3, dy = + 25mVelocity Initial= 2.2 m/s

(c) Hit a pig target at dx = 1.3, dy = -15 mVelocity Initial= 1.5 m/s (going downward)

Angry Birds Launch Results:

Angle Theoretical dx Actual dx % Error60 857.2 m 5.3 m 16173.650 19 m 4.2 m 452.38145 0.0317 1.3 m 2.43846