1. EF-151 RUTH GOLDBERG DEVICE
Ryan Stevenson
Jason Hill
Elisha Booker
Clint Bryant

2. DESIGN Simple & repeatable device
Brainstorming and using videos for ideas
Four main contraptions
Newton’s Cradle
Marble Launch Tube
Mouse Trap Trigger
Swinging Rod

3. OPERATION Newton’s cradle activates Marble launches from tube
Activates mouse trap
Mousetrap removes pin via fishing line
Wooden rod swings down
Displays banner
Launches final marble

4. CONCEPTS AT WORK Newton’s cradle Marble launch Tube Swinging rod
Conservation of energy and momentum
Marble launch Tube
Conservation of energy
Trajectory
Swinging rod
Mass moment of inertia
Conservation of angular and linear momentum

5. CALCULATIONS/ASSUMPTIONS
Friction neglected
Force exerted by mouse trap neglected
All calculations are approximate
Assume rod is perfectly cylindrical
Assume Newton’s cradle is perfectly elastic
Device
Concept Involved
Equations used
Known Variables
Calculation
Falling domino
Conservation of energy ft
ft/s
Newton’s cradle golf ball in
Golf ball impacts marble
Conservation of momentum
50 g g
Ball in tube
Marble launch
Trajectory
Falling rod
Conservation of rotational energy
Large marble impact

6. OBSTACLES Having previous group start device
Consistency with mousetrap
Switched to heavier marble
Dimensional restrictions
Making everything fit
Limited access to tools
Miter saw and other tools would’ve made process smoother

7. CONCLUSIONS Device is consistent Team work is key
Insight to engineering design
Budget constraints
Dimensional restraints
Strict timeline