Lowering an object without breaking the the rope

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In summary, the correct solution to lower a 1000 N object from a roof using a cord with a breaking strength of 800 N is to slow down the acceleration to a point where the force down is less than 800 N. This can be achieved by setting up ∑F=ma and considering the weight and tension force acting on the object.
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Kingyou123
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Homework Statement


How could a 1000 N object be lowered from a roof using a cord whose breaking strength is only 800 N?

Homework Equations


∑F=ma

The Attempt at a Solution


By slowing down the acceleration to a point where the force down would be less than 800.
weight=m(g)
1000N=m(9.8)
102.04kg=m
∑F=ma
799.99=102.04kg(a)
7.84m/s^2=a
Would this be the right answer?
 
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  • #2
This is not the correct answer. Be sure to draw a free body diagram of the object. How many forces act on the object as it is being lowered?
 
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  • #3
TSny said:
This is not the correct answer. Be sure to draw a free body diagram of the object. How many forces act on the object as it is being lowered?
The two forces are weight and force tension. Where did I go wrong exactly?
 

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  • #4
Diagram looks good. When you set up ∑F = ma, the left side represents the vector sum of the two forces.
 
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FAQ: Lowering an object without breaking the the rope

How can I lower an object without breaking the rope?

The key to lowering an object without breaking the rope is to evenly distribute the weight of the object along the length of the rope. This can be achieved by using multiple ropes or by attaching the object to a harness or sling that can evenly disperse the weight.

What type of rope is best for lowering heavy objects?

The best type of rope for lowering heavy objects is a strong and durable rope, such as a kernmantle rope or a static rope. These ropes are designed to withstand heavy loads and have a low stretch, making them ideal for lowering objects without breaking.

Do I need any special equipment to lower an object without breaking the rope?

In addition to a strong rope, you may need some additional equipment such as carabiners, pulleys, and a belay device. These tools can help to distribute the weight of the object and make the lowering process more efficient and safe.

What are some safety precautions I should take when lowering an object?

Before lowering an object, it is important to ensure that the rope is in good condition and can support the weight of the object. It is also crucial to have a clear and safe area for the object to be lowered, and to communicate effectively with any other team members assisting with the process.

Are there any techniques for lowering an object without breaking the rope?

One technique that can be useful for lowering an object without breaking the rope is to use a counterweight. This involves attaching a lighter weight to the other end of the rope and using it to counterbalance the weight of the object being lowered. This can help to reduce the strain on the rope and prevent it from breaking.

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