RUBE GOLDBERG DEVICE

John ScobeyMohssen FathiJoel Bowers Michael Stanford

Steps Pinball shooter shoots marble Marble rolls down wooden ramp Marble rolls off ramp made of car track Marble goes through funnel Marble rolls down PVC ramp and hits

heavier marble Heavy marble knocks mouse off Mouse falls on mouse trap, which

releases string to raise banner

Pics

Front View

Back

Banner

Ramp

Dead Mouse

Funnel

Shooter

Equations

Pulleys Constant Acceleration Trajectory Conservation of Momentum Spring Equation Centripetal Conservation of Energy

PotentialKinetic

€

S = S1 + v0t +12 at

2

.762m = 0 m s + (3.867m s)t + 12 (−9.81m s

2)t 2

t = .16325s

Pinball Shooter Calculations

€

12kx 2 = mgh

12(k)(.06m)2 = (.003kg)(9.81m s 2)(.762m)

k =12.4587 N m

Solve for Spring Constant

€

F = kx(12.4587 N m)(.06m) = .7475N

Force of Spring

Time to reach Max Height€

12kx 2 =

12mv i

2

12(12.4587 N m)(.06m)2 =

12(.003kg)(v i)

2

v i = 3.867m s

Initial Velocity

€

m = 3g→.003kgh = 30in→.762mx = 6cm→.06m

Variables

Video