a) Two objects attract each other with a gravitational force of magnitude 9.30 x10-9 N when separated by 19.4 cm. If the total mass of the objects is 5.06 kg, what is the mass of each?(adsbygoogle = window.adsbygoogle || []).push({});

Heavier mass_______kg

Lighter mass______ kg

my attempt:

F=Gm1m2/r^2

so I rearranged to get m1 and m2 by itself and got (r^2)(F)/G=m1m2

5.247598=m1m2

but how do I get the mass for m1 and m2 separately is m1 + m2 = 5.06 kg?

b) A dental bracket exerts a horizontal force of 86.2 N on a tooth at point B in the figure. What is the torque on the root of the tooth about point A? (PLEASE SEE THE ATTACHMENT FOR THE PICTURE)

I know I need to break the forces up into components but I am lost on this question. Please help me! Thank you

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# Rotational Motion and Law of Gravity

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