JAMB - Physics (1980 - No. 1)
Which of the following statements are true of the law of universal gravitation?
any two bodies attract each other with a force which is proportional to the difference of their masses
any two bodies attract each other with a force which is inversely proportional to the square of the distance between them
any two bodies attract each other with a force which is proportional to the product of their masses and inversely proportional to the square of the distance between them
any two bodies attract each other with a force which is proportional to the square of the distance between them
any two bodies attract each other with a force which is proportional to the sum of their masses