Physics Problem Help: Chin-Up Force & Velocity

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The discussion centers on solving a physics problem involving a chin-up where a person exerts a force of 700N, with each arm providing 355N during the initial 25 cm lift. Participants emphasize the importance of understanding energy, work, and force concepts, suggesting the use of free body diagrams to visualize the forces involved. Key equations mentioned include the work-energy principle, which relates kinetic and potential energy to work done. To find the final velocity, users are encouraged to derive the expression using the provided formulas and substitute the relevant values. The conversation highlights the need for a clear grasp of the underlying physics principles to solve the problem effectively.
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I am working on a physics problem which states:
A person doing a chin-up 700N exclusive of the arms. During the first 25.0 cm of the lift, each arm exerts an upward force of 355 N on the torso. If the upward movement starts from resdt, what is the person's velocity at this point?

This is probably very basic, but I am having trouble with this whole energy, work, force, tension thing.
 
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Explain what you've tried and what equations are relevent. Have you drawn a free body diagram and labeled the forces?
 
You should have these formulas, derive an expression for final velocity and then plug in your numbers

Kf – Ki + Uf – Ui = Wnc
1/2mVf-1/2Vi+mgyf-mgyi=Wnc
 

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