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January 27, 2015

January 27, 2015

Posted by **Abi** on Saturday, April 30, 2011 at 3:29pm.

a) Determine the force of attraction between the larger and smaller balls that had to be measured by this balance.

b) Compare this force to the weight of the small balls.

Ok... so for the first one I have to use the equation given and change the values to kilograms and meters, and use the radii instead of the diameters, this is what I know, but I don't know how to do it when there are three spheres (the big one and the 2 small ones)... I don't get what they are asking for the second part...

Someone please help, it will be deeply appreciated...

- Physics Urgent!! -
**bobpursley**, Saturday, April 30, 2011 at 3:31pmDouble the force: you have two big ones, each pulling on one small

- Physics Urgent!! -
**Abi**, Saturday, April 30, 2011 at 3:59pmOk, so I have r1= 0.0254m, m1=0.730283 kg, r2= 0.152m and m2=157.850 kg... I calculated

(6.674E-11)(0.730283)(157.850)/(0.152m-0.0254m)^2 and I got 4.77E-7 and multiplyed it by 2 and then I got 9.54 E-7... Does this looks right?

- Physics Urgent!! -
**Abi**, Saturday, April 30, 2011 at 4:01pmIs that for A?

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