Recent content by ziywang50

Here is my friend lifting, as an example

@berkeman Dumbell lifting can be fine.

Thank you for answering my post in detail. Yes, we can assume normal bicep curl for now. I am not a weight lifter, but I want to use code developed by other developers to find pose of a person then find if the weight is too heavy for that person by some physics calculation. The input should be a...

@berkeman I mean acute injuries, because I am looking at a weight lifting problem. Not chronic injuries.

Like an example would be which pose or which weight

@berkeman I just want to decide how to minimize the elbow injury from physics calculations.

Honestly any injury. But the paper gives elbow injury so I am considering elbow injury now

@berkeman I am asking because I am not sure how to calculate the reaction force, and I do not know when the arm is horizontal it maximizes the reaction force. I mean it is shown on the paper but it is not really based on any theory and I am not going to use that simulation software they used. I...

I read frm here. The diagram, maybe I will draw it later.

Homework Statement:: This is not a homework, but I want to know how to find the joint reaction force of the 2d elbow flexion, if I know the angular acceleration of the forearm, and the mass of elbow with a known weight on hand. I assume the forearm is a simple cylinder. Suppose the angular...