# Physics

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Neutral metal sphere A, of mass 0.10kg, hangs from an insulating wire 2.0m long. An identical metal sphere B, with charge -q is brought into contact with sphere A. Sphere A goes 12 degrees away from Sphere B and there is a 90 degree angle at Sphere B. Calculate the initial charge on Sphere B.

Note: when one object with charge Q is brought in contact with a neutral object 1/2 the charge is transferred to the neutral object.

I don't understand how to do this.
Ans: 3.9x10^-6C

• Physics -

What do you mean a 90 degree angle at sphere B? Ninety degrees between what and what? I assume the 12 degrees is measured between A and B.

• elementary my dear wanda -

It very simple, you must study hard much if you look for wanting better marks in you're physics, you know good

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