Hello and welcome to the community! It's great to see you here and I'm happy to help with your coursework.
To answer your question, yes, there is a law that explains the relationship between the height from which an object is dropped and its velocity as it falls. This law is known as the Law of Conservation of Energy, which states that energy cannot be created or destroyed, only transferred or transformed.
In the case of an object being dropped from a height, it has a certain amount of potential energy due to its position in the gravitational field. As the object falls, this potential energy is converted into kinetic energy, which is the energy of motion. The higher the initial height, the more potential energy the object has, and therefore, the more kinetic energy it will have as it falls.
This means that the velocity of the object will increase as it falls from a higher height, as more potential energy is being converted into kinetic energy. However, it's important to note that this law assumes there is no air resistance or other external forces affecting the object's motion.
I hope this helps with your coursework. Best of luck with it!