Physics

2

Rube Goldberg Device

Michael Priebe

Southern New Hampshire Univerasity

PHY-101

Prof Taylor

9/19/2021

Link to the referenced device: https://www.youtube.com/watch?v=TJEERMFyJLI

In this device, I have selected the motion manifested in the 0.26 – 0.28 second of the illustrated machine. In this motion, the marble is implicated to manifested an initial velocity of 0 m/s before it was triggered to roll along the track (Questacon, 2013, 0.26-0.28). Before this stage, a mutual series of reactions that cause each subsequent step is evident in a concept commonly referred to as the domino effect; the marble’s motion tends to have been caused by the same effect. This step comes into reality as a result of the concept of conservation of momentum and energy, which are fundamental principles that define the operation of this device (Hongting, 2020). The energy and momentum evident in the previous motion is the actual cause of the stationary marble's motion; the respective energies are transmitted to the next stage that causes the marble to topple; hence it's rolling.

Since the marble was at rest in the beginning, its initial motion proves to be 0 meters per second; the displacement of the marble was 0 m initially. The marble manifested potential energy initially before it assumed kinetic energy.

Velocity= displacement/ time taken

= 0 m/ 0.26 s

= 0 m/s

The selected track of motion manifests a displacement of 1.2 m and 0.02 seconds. This implies that the final velocity of the marble in the chosen motion is;

Velocity= displacement/ time taken

= 1.2 m / 0.02 s

= 60 m/s

Therefore, the acceleration of the motion is;

= change in velocity/ time taken

= (60 m/s -0 m/s) / 0.02 s

= 3000 m s−2

As provided by Newton’s second law, the force acting on the object is determined as;

F= mass x acceleration

= 0.05 Kg x 3000 m s−2

= 150 N

References

Hongting, N. (2020). Rube Goldberg Machine Report. The Frontiers of Society, Science and Technology, 2(15).

Questacon. (2013, Sep 20). Rube Goldberg Machine. [Video]. YouTube. https://www.youtube.com/watch?v=TJEERMFyJLI