7/21/2019 Rube Goldberg Calculations

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Rube Goldberg Calculations

Alma Wolf and Cecilia Compton

Calculation 1:a. Velocity of marble dropping from funnel

elocity istance/timeV    = d   

Velocity (measured with Photogate): .96 m/ s1   2  

Calculation 2: Conservation of Energy for marble

dropping from funnel

ravitational   P otential   Energy ass ravity eight G   = m   * g    * h  

 E    . 02173 .8 .4826 P    = 0   * 9   * 0  

 E    .10277 Joules P    = 0  

inetic  Energy   /2   ass K    = 1   * m   * velocity2

 

 E    /2 .02173 .96 K    = 1   * 0   * 1  2

 

 E    .01086 .8416 K    = 0   * 3  

 E    .04173 Joules K    = 0  

ercent   Eff iciency E / P E    00 P    = K    * 1  

0% E  = 4  

Calculation 3:

a. Ideal mechanical advantage (IMA) of

teeter totter

esistance  Distance   0 cm   .1 m R   = 1 = 0  

 ff ort   Distance   .8 cm   .048 m E    = 4 = 0  

 MA D/ RD I    = E   

 MA  .048/0.1

 I   = 0

 deal   Mechanical   Advantage  .48 I    = 0  

7/21/2019 Rube Goldberg Calculations

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Calculation 4: Conservation of Energy of brown marble

otential   Energy ass ravity eight  P    = m   * g    * h  

 E    . 01954 .8 .0889 P    = 0   * 9   * 0  

 E    .017 Joules P    = 0  

inetic  Energy   /2 K    = 1   * m * v2  

elocity istance/timeV    = d   

.15m/.16 sV   = 0  

.93 m/ sV   = 0  

 E    /2 .01954 .93 K    = 1   * 0   * 0  

 E   .009

 K   = 0

 

ercent   Eff iciency E / P E    00 P    = K    * 1  

.009/0.017 E  = 0  

2% E  = 5