How Do Gravity, Force, and Buoyancy Interact? - Physics Forums
2003年8月29日 · This is because the buoyant force is a result of the difference in density between the object and the fluid it is submerged in. 5. How does gravity affect buoyancy? Gravity plays a crucial role in determining the buoyant force on an object. The force of gravity pulls objects towards the Earth's surface, while the buoyant force pushes them upwards.
Is Gravity Really a Force? A Look at General Relativity's Perspective
2020年5月14日 · Classically (meaning non-quantum and non-GR) gravity is described by Newton's law of Universal Gravitation, in which gravity is certainly a force. However, General Relativity supersedes classical physics when it comes to gravity, and gravity is instead the manifestation of curved spacetime and is not a force.
Is Gravity a Force or Curvature? - Physics Forums
2024年2月24日 · As described by Newton, gravity is a force which attracts object towards it. F = (G m1 m2) /r² Gravity is a force directly proportional the product of masses of two objects and inversely proportional to the square of distance between two objects. According to Cavendish experiment, gravity is a force acts on and is also exerter by smaller objects.
Is gravity a force, or curvature of space-time? - Physics Forums
2009年7月26日 · FAQ: Is gravity a force, or curvature of space-time? 1. What is the current scientific understanding of gravity? The current scientific understanding is that gravity is not a traditional force, but rather a curvature of space-time caused by the presence of massive objects. This is known as Einstein's theory of general relativity. 2.
Understanding the Difference: Gravity vs. Strong Force Explained …
2005年7月3日 · The electromagnetic force operates on a different physical quantity (electric charge) than gravity (mass) so it cannot be compared directly to gravity. To note that gravity is an extremely weak force is, from the point-of-view of natural units, like comparing apples to oranges.
Normal Force and Force of Gravity: When and why are they equal?
2010年3月17日 · Normal force is the force exerted by a surface on an object that is in contact with it. Force of gravity is the force of attraction between two objects due to their masses. When are normal force and force of gravity equal? Normal force and force of gravity are equal when an object is at rest on a horizontal surface.
Is Gravity a Force? Modern Physics Explained - Physics Forums
2008年1月3日 · FAQ: Is Gravity a Force? Modern Physics Explained 1. Is gravity really a force? Yes, gravity is considered to be one of the four fundamental forces in the universe, along with electromagnetism, strong nuclear force, and weak nuclear force. It is responsible for the attraction between objects with mass and is a crucial aspect of modern physics. 2.
Is Gravity a Force? Debate & Questions - Physics Forums
2008年11月9日 · The debate about gravity as a force has led scientists to develop new theories and models to better understand the nature of gravity and its role in the universe. It also highlights the complexity of the universe and the need for continued research and exploration to fully understand the fundamental forces that govern it.
When is g (9.8) negative or positive? - Physics Forums
2013年10月22日 · The acceleration due to gravity is a vector. It has a magnitude of 9.8 m/s², and its direction is downward. Whether or not that is negative or positive depends on your choice of coordinate system. If you had a coordinate system where up is positive then gravity would be negative since its direction is the opposite of your positive direction.
Is Gravity Just the Electrostatic Force? - Physics Forums
2022年7月19日 · FAQ: Is Gravity Just the Electrostatic Force? What is the electrostatic force? The electrostatic force is a fundamental force of nature that describes the attraction or repulsion between electrically charged particles. It is responsible for holding atoms and molecules together, as well as determining the behavior of objects on a macroscopic scale.