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The gravitational force between two masses is

F = G \frac{m _{1} m _{2}}{r ^{2}}

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Notes for FBISE class 10 (SSC-II), class 11 (HSSC-I) and class 12 (HSSC-II): 227 units in 16 subjects, with 9,019 exercise questions and 2,341 paper questions solved.

Still being written: Class 12 Chemistry unit 9, Class 12 Chemistry unit 10, Class 12 Mathematics unit 8. Class 12 Mathematics units 9 and 10 are not written yet.

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