Comprehension Passage
Gravitation is a fundamental force that attracts any two objects with mass. The greater the mass of the objects, the stronger the gravitational pull. Sir Isaac Newton formulated the Universal Law of Gravitation, which calculates this force as proportional to the product of the two masses and inversely proportional to the square of the distance between their centers. This principle explains phenomena from falling objects on Earth to the orbits of planets and galaxies.
The force of the Earth's gravity on every kilogram is about:
1
20 N
2
10 N
3
5 N
4
15 N