WHAT IS :
i) PRODUCT RULE
ii) INVERSE - SQUARE RULE
iii) UNIVERSAL GRAVITATIONAL CONSTANT
iv) UNIVERSAL LAW OF GRAVITATION ?
Product rule: Force between two mass separated by a distance is directly proportional to the product of the two masses.
Inverse Square rule: Force between two mass separated by a distance is inversely proportional to the square of the distance between the two masses.
Universal gravitational constant: The constant of proportionality is called the universal gravitational constant.
Universal law of gravitation: The whole law, F = Gm1m2/r2 is called the universal gravitational constant.