Engineering Project (Projectile motion/ impulse momentum)

EGR 2100 Project 2

Optional Project ‘Testing’: Friday, November 20th, 1:00 pm Project Deliverables Due: Tuesday, November 24th, midnight

You make work in teams of 2 or work on your own for this project. You will play the game Angry Birds and make observations on how you must launch the birds in order to knock over the items. You will also need to complete the calculations below. A report is required on the project.

1. To begin the analysis, play the game Angry Birds (any version). Pay attention to how the path of the birds (the projectiles) changes as you change the launch angle and how far back you pull the birds at launch. Make note of these observations – you will need to discuss them in your report.

2. For the given data, determine the information requested. Be sure to show your work and discuss the results in the report.

a. Initial velocity is 35 m/s; you want the bird to hit a stack of blocks that are 40 m away at the very

bottom of the stack (see picture). i. How long is the bird in the air?

ii. What are the possible angles of launch? iii. Which angle do you think would knock the blocks over and why?

b. Initial velocity is 25 m/s; you want the bird to hit a stack of blocks that are 40 m away at the

bottom of the top block (see picture), which is 4.5 m from the ground. i. How long is the bird in the air?

ii. What are the possible angles of launch? iii. Which angle do you think would knock the blocks (or some of the blocks) over and why?

c. Initial velocity is 25 m/s; you want the bird to hit a stack of blocks that are 40 m away at 2m from

the bottom of the stack (see picture). i. How long is the bird in the air?

ii. What are the possible angles of launch? iii. Which angle do you think would knock the blocks (or some of the blocks) over and why?

3. Now, discuss how the size (mass) of the bird could change the possibilities for all scenarios in #2. Use the concept of Impulse-Momentum to support your answers. You do not need to do any calculations, only talk about how different birds influence the how you launch the bird – you can experiment with the game to see how you must launch a smaller bird compared to a larger bird to knock over the objects.

Deliverables (*** Everything may be submitted digitally – but it needs to be all together):

1. Cover sheet with names, project title, class, date 2. Discussion on how projectile motion enters into the game of Angry Birds. Be sure to discuss the launch

angle and velocity (how far back you pull the bird upon launch) as well as how you determine the launch angle and velocity in order to knock over the items (no calculations, only talk about how the game works in terms of dynamics and projectile motion).

3. Calculations from #2 and the discussion on each. Be sure to show the calculations professionally (maybe a table with values or well-organized work).

4. Discuss the concept of Impulse-Momentum and how you may use this concept to change how you launch the birds (angle and velocity).

Birds

40 m

2 m

4.5 m

Launch position

y

x