Gravitational Force Learning App & e-Book: MCQ 371

According to Newton's law of universal gravitation, any two particles of finite mass attract one another with a force which is

1. Inversely proportional to the product of their masses and directly proportional to the square of their distance apart
2. Inversely proportional to the product of their masses and directly proportional to their distance apart
3. Directly proportional to the product of their masses and inversely proportional to their distance apart
4. Directly proportional to the product of their masses and inversely proportional to the square of their distance apart