Question

why is the law of gravity an example of a universal law?
○ gravity exists between small masses in an open system only.
○ gravity exists for masses in a closed system only.
○ gravity exists between any two masses.
○ gravity exists only on the earth and the moon.

Explanation:

A universal law applies everywhere. The law of gravity (Newton's law of universal gravitation) states that every particle attracts every other particle with a force. So gravity exists between any two masses, making it universal. The other options limit gravity (to open/closed systems, or only Earth - Moon), which is incorrect.

Answer:

C. Gravity exists between any two masses.