Magnets making things hurtle towards me eep

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SUMMARY

The discussion focuses on calculating the acceleration and final velocity of a 1 kg iron sphere influenced by a 3 Tesla magnet positioned 2 meters away. Key concepts include the definition of Tesla as a unit of magnetic flux density, where 1 Tesla equals 1 N/(A·m). The participant expresses uncertainty about the impact of gravity and the direction of the magnetic field on the sphere's motion. Understanding the magnetic field's direction is crucial for accurate calculations, particularly in contexts like MRI scanners.

PREREQUISITES
  • Understanding of magnetic flux density and its unit, Tesla.
  • Basic knowledge of Newton's laws of motion.
  • Familiarity with the Lorentz force equation: B = F/qv.
  • Concept of magnetic field direction and its relevance in physics.
NEXT STEPS
  • Research the Lorentz force and its application in magnetic fields.
  • Learn about the effects of gravity on objects in magnetic fields.
  • Study the principles of motion in magnetic fields, particularly in MRI technology.
  • Explore the relationship between magnetic field strength and force on charged particles.
USEFUL FOR

Physics students, educators, and anyone interested in the dynamics of magnetic fields and their effects on objects, particularly in medical imaging technologies like MRI scanners.

lythia
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If I have a magnet of known strength (say 3 Tesla) and I have a solid iron sphere of 1 kg and it is positioned 2m from the magnet, how do I go about calculating its acceleration and so its final velocity upon reaching the magnet?

Do I need to worry about gravity and starting height? I'm obviously going to ignore air resistance..

I'm really sorry if I've missed something obvious, but I've been thinking about this for ages. I think the reason I might be struggling is that I'm unsure of exactly what "1 Tesla" actually means.. I've looked up the definition but I'm still feeling shaky on it. :shy:

Thanks if you can help. I'm sorry I can't give anything back to these fora yet, hopefully one day I'll get more confident with my Physics and be able to help some others out!
 
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1 Tesla = 1N/Am because B=F/qv (force over charge and velocity)

1. you need to know the direction of the magnetic field

wat have you done so far? care to show?
 
Ah, I'm not sure I knew that second equation.. What does the charge relate to in it?

I've tried to construct a diagram, and in that I've shown the iron sphere in line with the flux running straight through it.

I was trying to do it in the context of a magnet in MRI scanners. Can I chose any direction of field? I thought that saying the lines of flux passed straight through would be simplest.. Does it make a big difference which direction they're in?

Thanks
 

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