# How much power is required?

1. Sep 4, 2016

### Nibesh sharma

• OP warned about not having an attempt at a solution
1. The problem statement, all variables and given/known data
How much power is required to lift the object A from the base B to a height of 1 meter if the given object A weighs 1 kilogram?

2. Relevant equations
No idea

3. The attempt at a solution

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2. Sep 4, 2016

### cnh1995

That's something you are supposed to avoid.
You are asked to lift an object using an electromagnet. Is object A a permanent magnet? Please state the complete problem clearly.

3. Sep 4, 2016

### Staff: Mentor

Surely you can find relevant equations. Also, are you sure that the problem statement is correct: you are asked to calculate the power?

4. Sep 4, 2016

### Nibesh sharma

Assume object A is magnetic material having same pole of the electromagnet's surface it's exposed to.

5. Sep 4, 2016

### Nibesh sharma

Yes calculate the power required if the object A is a magnetic material and it is facing the electromagnet with like poles exposed towards the magnet

6. Sep 4, 2016

### cnh1995

Power is Joules/second. There is no mention of time in your problem.

7. Sep 4, 2016

### Staff: Mentor

The problem is now clearer. It is no the power to lift, but to maintain the height against gravity.

8. Sep 4, 2016

### cnh1995

Right! I was about to delete that but I can't..

9. Sep 4, 2016

### Nibesh sharma

Okay take it this way then... How many watts is it going to take for the electromagnet(if you need to know anything about the specs of magnet just ask) to complete the task?

10. Sep 4, 2016

### Staff: Mentor

As I posted in your other thread, this is not the way things work here. You have to put in some effort.

I think that your problem is way underdefined. We have no idea what material the hovering object is made of, are any characteristic of the electromagnet.

11. Sep 4, 2016

### Nibesh sharma

Okay
okay, the time is 1 sec and the electromagnet's specs is what I'm Trynna figure out here.... I want to know what the electromagnets power output should be..

12. Sep 4, 2016

### Nibesh sharma

And the material like I already mentioned: it's magnetic, and if facing the electromagnet as such the like poles of material and magnet are facing each other. I don't know how can I be more clearer atm.

13. Sep 4, 2016

### Staff: Mentor

Maybe you mean unlike poles face each other?

Whatever the case, I don't think anyone will be able to come up with an answer for you. You want a magnet so strong that it will reach across 1 m of air to hold a 1kg weight in place, so say 10N at that distance. Magnets work best through narrow gaps of air. The big electromagnets on the end of cranes in metal scrapyards might not even manage your task.

14. Sep 4, 2016

### vela

Staff Emeritus
I think the idea is the electromagnet is on the bottom and repelling the object while gravity is pulling down on the object, so you want the same poles facing each other.

15. Sep 4, 2016

### Staff: Mentor

There is no simple calculation for what you are asking, and it is most probably not achievable.