- #1
2 wires attached to another wire attached to a block
- Thread starter random124
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SUMMARY
The discussion centers on the relationship between weight and tension in a system of cords supporting a suspended object. It establishes that the weight of the object is equal to the tension in cord C due to the absence of acceleration, as indicated by Newton's first law. The forces acting on the suspended object include gravity and the tension from the cord, leading to a net force of zero. The analysis emphasizes the importance of drawing a force diagram to visualize these relationships clearly.
PREREQUISITES- Understanding of Newton's laws of motion
- Familiarity with force diagrams and free-body diagrams
- Basic knowledge of tension in strings and cords
- Concept of net force and equilibrium in physics
- Study Newton's first law of motion in detail
- Learn how to construct and interpret free-body diagrams
- Explore the concept of tension in multiple cord systems
- Investigate equilibrium conditions for static objects
This discussion is beneficial for physics students, educators, and anyone interested in understanding the mechanics of forces in static systems, particularly those involving tension and equilibrium.
- #2
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Draw a force diagram
- #3
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What forces act on the suspended object? Is the suspended object accelerating?random124 said:
The "relevant equations" item in the template is for standard equations, such as Newton’s laws, that would be relevant to the question. Which of those relates forces on a body to its acceleration?
- #4
random124
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the object has no acceleration its suspended.
- #5
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Draw a force diagram
- #6
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So what does that tell you about the net force acting on it?random124 said:
And what forces contribute to that total?
- #7
random124
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That the net force is 0 but I don't understand why is the weight and tension of the cord that's pushing the weight up equal if there are other cords attached
- #8
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The other cords are not attached to the weight.random124 said:
Each body only "knows" about the forces that act directly on it. The suspended body is only directly acted on by gravity and the vertical cord; that cord (taken as massless) is only acted upon by the suspended weight and the knot; the knot is acted on by three cords; etc.
If the knot were directly attached to a ceiling instead of to the upper two cords it would make no difference to anything below the knot.
- #9
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DO A FORCE DIAGRAM !!!random124 said:
- #10
Lnewqban
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Welcome!random124 said:
When your fingers are holding a suspended bad of groceries, do they feel increased or reduced weight of the groceries?
The handles of the bag are also supporting as much weight as your fingers.
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