Masses of two unknown objects

[Franster]

I am trying to Determine the masses of two unknown objects without weighing them or using density

Does anyone know of a good method.

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[pierre975]

From my point of view, in a mathematical way, if the unknown object would be labeled A and B, the weight would be A gram/ kg, and B gram/ kg.

If it is unknow objects, then shurely the weight would be unknown as well......

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As a driver I hate pedestrians, and as a pedestrian I hate drivers, but
no matter what the mode of transportation, I always hate cyclists.

[Franster]

I am looking for a method that can be used. When I have a object A and object B, I will have to determine the mass of object A and object B without weighing the objects or using their density to determine the mass of the objects.

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[FMaree]

May I ask why?

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Francois

[Franster]

I have a science project to complete. This will be a part of it. Designing a method to determine the masses

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[Pyro]

Moer them with something known, and measure the impulse they get?

Can't really think of a way that doesn't qualify as measuring or knowing desnity.

[FMaree]

If it's unknown objects, and you cannoth weigh them or use density, there's not really a way I can think of. I was thinking that if you know the material they are composited of, you can calculate their volume and use their atomic mass to perhaps calculate their weight, but seeing as they are unknown objects I have no idea.

Anyway, isn't this your homework?

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Francois

[Pat]

In what grade are you? Cause when I was in Gr12 last year, we used a formula where you have 'm1' and 'm2', which represents the mass. You then also have 'r' which is the distance between the radius' of the two bodies. And you also have 'G' which is I think the gravity constant. I think you also have 'l', I think. It's something like G = m1m2/r.

Hope it helps you.

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Man who says it can’t be done shouldn’t disturb man doing it.

[Franster]

By unknown objects I mean two objects will be givin to us and then we have to determine the mass of both objects without weighing them or using density.

Pat the formula u are thinking about is F = Gm1m2/r²
This is to determine the gravitational force exerted by two objects.

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[Pat]

In that case I'm glad you're not taking my advise. I'm so glad I'm outa school!

Bummer!

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Man who says it can’t be done shouldn’t disturb man doing it.

[spitfire]

You could use F = ma. Apply a certain force and measure the acceleration, then use those values to determine mass.

[spitfire]

This would have to be in a vacuum, so there is no air resistance.

[APG]

OK, it depends on what you define as "weighing", but you could use simple harominc motion to do this... I taught it to 2nd year physics students at varsity. This is similar to the mass measurements the guys did on Skylab.

Refer to this link: http://teacher.nsrl.rochester.edu/PHYInq/Experiments/P19/P19_SHM_Mass_on_Spring.html

It will give you a good overview of the theory and a simple experiment you can put together to do this.

PS: if there's any prize money involved, you now need to share

[APG]

[MysteriousKnight]

When is the project due, i have an awsome teacher, she should know about what APG was saying...