What Forces Act on a Man and Platform System in a Pulley Setup?

AI Thread Summary
To solve the problem of a man weighing 180 lbs and a platform with a frictionless pulley weighing 43 lbs, a free body diagram is essential to identify the forces acting on the system. The upward forces include the tension in the rope, which is equal to the force exerted by the man, while the downward forces consist of the combined weight of the man and the platform. To lift both the man and the platform at an acceleration of 1.2 ft/s², the net force must account for gravity and the desired acceleration. The tension in the rope must be calculated based on these forces, leading to the required pulling force. Understanding these dynamics is crucial for accurately determining the necessary force in this pulley setup.
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Question: Just give me hint of free body diagram where force will be considered because I have to find the force.I have tried this problem with past rules but now al little force problem so the question is
Question: A man weights 180lb;the plateform and attached frictionless pully weigh a total of 43lbs.Ignore the weight of the rope.With what force must the man pull up on the rope in order to lift himself up and the plateform upward at 1.2ft/s^2
Thanks
 
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Newtons Law problems Help

Dear Users
Can i consider my problem with the (Atwood's) Machiene in opposite direction
Thanks
 
don't worry about the atwood machine formulas...

just use the freebody diagram of the man+platform...

what are the forces acting on the system upwards... what are the forces acting downwards...

If he pulls with a force F on the rope, then what is the tension in the rope?
 

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