Rope with mass but ignoring Pulley

In summary, the conversation discusses the forces that a rope would affect on a man in a given problem. It is determined that the rope can only be in tension and there is no normal force involved. The weight of the entire rope must also be taken into account when considering the forces on the man.
  • #1
umaza
10
0
If there is a problem like in the image provided, and the rope has a mass but the pulley is not being considered in the problem, what forces would the rope affect the man with?

Since the rope touches the ground will the rope send a normal force up which pushes the man up? I am assuming that this does not take affect.

Would the man push down on all the mass of the rope or just what is present in the air or what is just above his hand? I am assuming that only the mass of what is above his hand counts.

I have come up with multiple solutions trying a combination of all the above, all I know is the force the man pushes down with should be half of what the weight of the total system because there is no acceleration, but what weight of the rope should be included?
 

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  • #2
welcome to pf!

hi umaza! welcome to pf! :smile:

a rope can only be in tension, not compression, there can be no normal force

and the weight of the whole rope, above the ground, must be taken into account
 
  • #3
Thanks a whole lot, I really appreciate it. That really helps.
 

FAQ: Rope with mass but ignoring Pulley

How does the mass of a rope affect its strength?

Adding mass to a rope can increase its strength, as the mass adds tension and stability to the rope. However, excessive mass can also cause the rope to become too heavy and difficult to handle.

Can the mass of a rope affect its flexibility?

Yes, adding mass to a rope can decrease its flexibility, as the added weight can make the rope stiffer and less pliable. This can make it more difficult to tie and manipulate the rope.

Does the mass of a rope impact its durability?

The impact of mass on a rope's durability depends on the type of rope and its intended use. In general, adding mass to a rope can increase its durability, but it can also put more strain on the rope and potentially weaken it over time.

How does the mass of a rope affect its performance in different environments?

The effect of mass on a rope's performance in different environments can vary. In some cases, added mass can provide more stability and strength in harsh conditions, while in others, it can make the rope less maneuverable and prone to damage.

Can the mass of a rope impact its cost?

Yes, the mass of a rope can affect its cost. Generally, ropes with higher mass are made with more materials and require more complex manufacturing processes, which can make them more expensive. However, other factors such as the quality of materials and construction also play a role in determining the cost of a rope.

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