1. The Danger Zone April 23, 2008 EF 151 Final Group Project

2. Our Team & Our Project Evan “Echo” Harb Jessie “Juliet” Moore Caleb “Charlie” Williams Reuben “Romeo” Robertson

3. Conservation of Energy KE + PE + W in = KE f + PE f + E loss PE = KE f PE = KE f mgh = 1/2mv 2 (.008)(9.81)(.085) = 1/2(.008)v 2 V = 1.29 m/s

4. Projectile Motion y-y o = (x-x o )tanθ – (g/(2V o 2 )(1+tan 2 θ)(x-x o ) 2 θ = 5.47

5. Conservation of Momentum M 1 = Marble M 2 = Rat Trap M 1 V 1 + M 2 V 2 = M 1f V 1f + M 2f V 2f M 1 V 1 = M 1f V 1f V 1 = V 1f V 1f = -1.28 m/s

6. Conclusion Friction was neglected on ramp and in funnel Coefficient of Restitution is ignored Marble hits the trap with 80% accuracy