Motion in Straight Line

Question

Two identical masses each of 10 kg are placed 1m apart on a tabletop. How many times larger is the gravitational pull of the earth on one mass than the gravitational attraction of other mass?

Solution

The gravitational pull of the earth on one of the mass is, F₁=mg
The gravitational attraction of other mass on first mass is,
 $straight F subscript 2 equals straight G straight m squared over straight r squared$
Now, the ratio of both masses is given by,
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$rightwards double arrow$ $straight F subscript 1 over straight F subscript 2 equals fraction numerator 9.8 cross times left parenthesis 1 right parenthesis squared over denominator 6.67 cross times 10 to the power of negative 11 end exponent cross times 10 end fraction equals 1.469 cross times 10 to the power of 10$
That is, the gravitational pull on one mass is 1.496 x 10¹⁰ times larger than the gravitational attraction of other mass.

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