Pulley system to lift container. How much force?

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SUMMARY

The discussion focuses on calculating the minimum force required to lift a container using a pulley system. It emphasizes that this force equals the weight of the container when in a static position. Participants suggest drawing a free body diagram to visualize the forces involved, including the applied force on the rope and the weight of the mass. The conversation highlights the importance of formulating an equation to simplify the analysis by potentially ignoring the force exerted by the shaft supporting the pulleys.

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llisle39
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1. I am stuck. Could anybody push me in the right direction?

Best Regards Lasse
 

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The minimum force needed to lift the weight will be the same as the force needed to hold the weight without falling.

So this is a statics question, find the force needed to keep everything where it is. Draw a free body diagram for the entire thing -- you should find the force F applied to the rope, the mass has some weight and there is some force applied by a shaft to hold the pulleys in place. Can you write an equation that will allow you to ignore the force applied by the shaft?
 

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