14. Which scientist discovered the law of universa gravitation? A. Robert Hooke B. Isaac Newton

## Step 1<br />The question is asking for the scientist who discovered the law of universal gravitation. The law of universal gravitation is a fundamental principle in physics that states that every particle in the universe is attracted to every other particle 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.<br />## Step 2<br />This law was first formulated by Sir Isaac Newton in the late 17th century. He proposed this law in his work "Philosophiæ Naturalis Principia Mathematica", which is commonly known as the Principia.<br />## Step 3<br />Robert Hooke, on the other hand, is known for Hooke's Law, which is a principle of elasticity. This law states that the force needed to extend or compress a spring by some distance is proportional to that distance.<br />## Step 4<br />Given the above information, it is clear that the scientist who discovered the law of universal gravitation is Isaac Newton.