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Good show.lollikey said:I got it ! the answer is (4f-7mg) / 7m
The discussion revolves around a physics problem involving two construction workers using pulleys to raise themselves on a platform. The problem includes variables such as the mass of the workers, the mass of the platform, and the forces they exert while pulling on the ropes. Participants are exploring the dynamics of the system, including the forces acting on both the workers and the platform.
The discussion is active, with participants providing insights and questioning each other's reasoning. Some participants express confusion about the forces involved, while others attempt to clarify the relationships between the forces and the resulting acceleration. There are ongoing explorations of the equations governing the system, with no clear consensus yet reached.
Participants are navigating assumptions about the system, such as the mass of the platform and the nature of the forces applied by the workers. There is mention of potential confusion regarding the normal force and the application of forces in the context of the problem.
Good show.lollikey said:I got it ! the answer is (4f-7mg) / 7m
Draw a line across just below the pulleys. How many ropes cross that line? What is the tension in each?Poetria said:Well, I can't understand why there are 4f and not 2f. I thought it was mechanical advantage but these pulleys are fixed to the ceiling, aren't they? I am obviously missing something.
Right.Poetria said:I see. There are four ropes and each of them has tension f.