ROLLING DOWN ROCKY TOP

Blake Hollis

Jordan Livesay

Kellen Catani

Sean Yu

D1 Team 3

Basics What is it?

Rube Goldberg device○ One input force = one task○ Inefficient and complicated

Bill of Materials

Concepts used Torque/ Rotational

Motion Spring Force Potential/Kinetic Energy Translational Energy

Building Process Tools used

Circular sawPower DrillJigsawHammer/NailsTape Measurer

Process Golf ball lies on top of a

board 0.2286 meters Trim piece connects to

the top and to the bottom with another board at a height of 0.0635m.

The golf ball will roll to the bottom of the trim piece with a velocity of 2.18m/sec. and strike a shaft (0.0635m) Shaft speed = 34.3 rad/sec

Second ball will hit a block Block speed = 1.01m/s

Process (Cont.) Block falls over and

starts dominoesDominoes speed

= .54 m/s Dominoes trigger

mousetrap Mousetrap releases

paperclip which allows banner to unfurl.

Calculations / Issues Issues

Absence of friction or losses of energy

Input force varies each time as well as direction of force

Ramps not sturdy○ Nailed ramp

Paperclip did not release○ Changed angle of

pull

22

'212211

'22

'112211

2

2/12/1

)(

/

2/1

mvI

vmmvmvm

vmvmvmvm

rv

mvmgh

Summary After issues were

solved, device worked fairly efficiently

Fun creative use of common objects

Some issues could not be resolved but we found ways around them