Which of the following exerts gravity? A. any object with mass B. only objects on Earth C. only planets, moons, and stars D. only the Earth

Answer Breakdown

1. Understanding Gravity
   Gravity is a force of attraction that pulls objects toward each other. The strength of this force is directly proportional to the masses of the objects involved and inversely proportional to the square of the distance between their centers.

2. Analysis of Options
   Let's analyze each option:

   • A. any object with mass: This statement is true. According to Newton's law of universal gravitation, every object with mass exerts gravitational force.
   • B. only objects on Earth: This statement is false. While objects on Earth experience gravity, other celestial bodies also exert gravitational force.
   • C. only planets, moons, and stars: This statement is partially true but misleading since it excludes smaller objects like asteroids and even everyday items that have mass.
   • D. only the Earth: This is false. The Earth does exert gravity, but it is not the only object that does.

3. Conclusion
   Based on the analysis, option A correctly states the principle of gravity. All objects with mass exert gravitational force, regardless of their size or location in the universe.

Final Answer

A. any object with mass.