Rube Goldberg Project
Calculation 1:
Velocity from video
Car Hitting Dominoes
Formula: V = d/t
Distance Between Marks:
0.015 m
Time Between Marks: 0.2 s
Velocity: 0.76 m/s
Calculation 2:
Velocity (using distance and time)
First Ramp With Marble
Formula: V = d/t
Length of Ramp:
.059 m
Time Clearing the Ramp: 2.08 s
Velocity: .028 m/s
Calculation 3:
Potential Energy
Marble about to Drop to Tube
Formula: PE = mgh
Marble Mass: .0049 kg
Height of Drop: .007 m
Gravitational Acceleration: 9.8 m/s2
PE: (.0049kg)(9.8g)(.007m)
PE: .00034 J
Calculation 4:
Kinetic Energy
Car On Ramp
Formula: KE = 1/2m(v2)
Car Mass: .015 kg
Velocity of car: .084 m/s
Gravitational Acceleration: 9.8 m/s2
KE: .003 J
Calculation 5:
Momentum
Marble on second ramp
Formula: P = m Ÿ V
Marble Mass: .0049 kg
Velocity of Marble: .31 m/s
Momentum: .0015 kg Ÿ m/s
Calculation 6:
Work
Dominoes Hitting Pencil
Formula: W = F Ÿ d
Force in Newtons: .15 N
Distance: .0065 m
Work: .00098 J
Calculation 7:
Impulse
Domino Hitting Lego Guy
Formula: FΔt = PF - Pi
Initial Momentum: 0 m/s (Pi)
Final Momentum: .068 kg Ÿ m/s (Pf)
Change in Time: .19 s
Impulse:
PF – Pi = F
F Ÿ Δt = impulse (N)
Impulse: 3.57 N
Calculation 8:
Hang Time
Wood Block Falling
Formula: √d/. 5 g
Distance Falling: .009 m
Gravitational Constant:
0.5 g (9.8 m/s2)
Hang Time: .134 s