Calculate Dumbbell Counter Weight for Correct Exercise Position

AI Thread Summary
The discussion focuses on designing a dumbbell support that ensures the dumbbell is presented in the correct starting position for exercises. The main challenge is determining the appropriate counterbalance for a range of dumbbells weighing between 15kg and 90kg. The user seeks guidance on whether an adjustable support is feasible and what calculations are necessary to achieve this. Key concepts to explore include moment arm and torque to effectively calculate the counterbalance needed. Assistance and insights from others in the forum are requested to address these technical challenges.
Fluxite
Messages
1
Reaction score
0

Homework Statement



Hi all, First post so please go easy :smile:

I am designing a Dumbbell support that presents the Dumbbell to the user in the correct exercise starting position (1. Shown on the image.) . The problem I am facing is the counter balance to the support. The Dumbbells range from 15kg-90kg and I assume the counterbalance has to match. My question is would it be possible to use an adjustable support (2. Shown on the image.) and what calculations would I need to calculate this?

Homework Equations



I would assume I need counter balance and pivot equations but I have no prior knowledge of this.

The Attempt at a Solution



Unsure, as stated no previous knowledge.

Any information or help would be greatly received,

Thank you in advance,
Samuel
 

Attachments

  • IMG_0376 Upload.jpg
    IMG_0376 Upload.jpg
    24.4 KB · Views: 522
Last edited:
Physics news on Phys.org
You'll want to investigate the concepts of moment arm, torque.
 
I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
Thread 'A cylinder connected to a hanging mass'
Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
Back
Top