A metaphysicist is someone creates or develops theories based on metaphysics. Metaphysics is a bransh of philosophy that explains the world, i.e., existence, space, time, cause and effect, objects and their properties, etc. Metaphysicists concentrate more on philosophy, and less on scientific method.
The scientist who can expound on the forces, center of gravity and acceleration is Sir Isaac Newton, the English physicist who discovered the force of gravity.
Metaphysics is a branch of philosophy that explores fundamental questions about the nature of reality, existence, and being. It deals with abstract concepts such as space, time, causality, identity, and substance, seeking to understand the underlying principles that govern the universe. Thinkers like Aristotle and Immanuel Kant have made significant contributions to the field of metaphysics.