- #1

ridiculoid

- 19

- 0

Hey everyone, been stuck on this for over a day now, wondering if anyone is able to tell me if I am on the right track.

"In your calculations for M1 (bell crank lever), note that the mass of the horizontal leg is contributing to the anti-clockwise moment. Given the masses and distances you have recorded for this experiment, calculate the mass of the horizontal leg."

Above is a diagram of what I am working with, I worked out the mass (0.3924N or 0.04kg) to bring it to equilibrium by physically attaching weights to the horizontal leg and now I am required to work out the mass of the horizontal leg itself. Also the circle of to the right is a pulley.

clockwise moments = anticlockwise moments

F=mg

Sum of moments = 0

Sum of forces = 0

I have attached my attempt in the form of a .pdf. I have tried to lay it all onto a horizontal plane like a beam support drawing because that is what I'm used to working with. The issue I am having is that my answer for the force coming down at the center of mass of the horizontal leg throws the balance of forces out, I end up with more downward force than upward force (which I have put at the pivot point).

Any help would be greatly appreciated.

1. Homework Statement1. Homework Statement

"In your calculations for M1 (bell crank lever), note that the mass of the horizontal leg is contributing to the anti-clockwise moment. Given the masses and distances you have recorded for this experiment, calculate the mass of the horizontal leg."

**http://imgur.com/a/ETYRT**Above is a diagram of what I am working with, I worked out the mass (0.3924N or 0.04kg) to bring it to equilibrium by physically attaching weights to the horizontal leg and now I am required to work out the mass of the horizontal leg itself. Also the circle of to the right is a pulley.

## Homework Equations

clockwise moments = anticlockwise moments

F=mg

Sum of moments = 0

Sum of forces = 0

## The Attempt at a Solution

I have attached my attempt in the form of a .pdf. I have tried to lay it all onto a horizontal plane like a beam support drawing because that is what I'm used to working with. The issue I am having is that my answer for the force coming down at the center of mass of the horizontal leg throws the balance of forces out, I end up with more downward force than upward force (which I have put at the pivot point).

Any help would be greatly appreciated.