Select the correct answer to complete the sentence. Gravitational force is said to be universal because: *
1 point
it operates in one direction.
it operates only within our solar system.
it applies mainly to planets and moons.
it applies to all objects.
it applies to all objects.
To determine the correct answer, we need to understand why gravitational force is said to be universal. The concept of gravity was first formulated by Sir Isaac Newton, who observed that all objects with mass attract each other with a force called gravitational force.
Now let's examine each option:
1. "It operates in one direction" is incorrect. Gravitational force operates between two objects and acts in the direction that pulls the objects together, so it is not limited to one specific direction.
2. "It operates only within our solar system" is also incorrect. Gravity acts between all objects with mass, regardless of their location in the universe. It is not limited to just our solar system.
3. "It applies mainly to planets and moons" is not correct either. While planets and moons are examples of objects that experience gravitational force, this force applies to all objects with mass, not just planets and moons.
4. "It applies to all objects" is the correct answer. The universal nature of gravitational force means it applies to all objects with mass, no matter their size or location in the universe. This includes everything from the smallest particles to the largest celestial bodies.
Therefore, the correct answer is: it applies to all objects.