Formulate three physics notes.

1. Newton's First Law of Motion states that an object at rest will remain at rest, and an object in motion will remain in motion at a constant velocity, unless acted upon by an external force. This law highlights the concept of inertia, which is the tendency of an object to resist changes in its motion.

2. The Law of Conservation of Energy states that energy cannot be created or destroyed, only transferred or transformed from one form to another. This principle is fundamental in understanding the behavior of energy in various physical systems, such as mechanical, thermal, and electromagnetic systems.

3. The Law of Universal Gravitation, formulated by Sir Isaac Newton, states that every mass attracts every other mass in the universe with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers. This law explains the gravitational force that governs the motion of celestial bodies, such as planets, stars, and galaxies.