Gravity and friction
Objects move according to their net force, or the total amount of force acting on them. Balanced forces are just that, balanced. An object with balanced forces will not move because the opposing forces will cancel each other out. However, if there are unbalanced forces, the object will move in accordance with the force that is greater. When moving though, there is always friction. Whether you be underwater, on the ground, or in the air there is always friction on the Earth. (Besides vacuums, of course.) Force is equal to mass x acceleration. With that you can find the forces of the object if you know its mass and acceleration.
Forces act by means of exchange particles. There are four basic forces (which operate in numerous different ways) each having its own exchange particle. The force of gravity is conveyed by the graviton. The electromagnetic force is conveyed by the photon. The two nuclear forces are conveyed by mesons. A particle that is exerting a force will emit an exchange particle, and a particle which is experiencing a force will absorb that exchange particle. That is essentially how it works, on a subatomic level. There are also mathematical equations which describe the forces, for example, the electromagnetic force is described by Coulomb's Law.
i knowwere you live ill punch you in the face
No; gravity will continue acting on your body. If there was no force acting on your body while in space (let's say an orbiting satellite), the satellite would fly out of Earth's orbit and just wander off forever, but that doesn't happen - so gravity has to be acting on the satellite and your body as well!
This is an odd example. Anything that is NOT solid earth is a non-example. So, a bird is not solid earth.
This is the geologic principle of uniformitarianism.
Magnetism, friction, and reaction forces in general.
Gravity and air resistance.
98.07 newtons on earth.
When going down a helter-skelter on the outside, the main forces acting on you are gravity pulling you down towards the center of the Earth and the normal force pushing against the slide to keep you on the curved track. Friction also plays a role in helping you move along the slide without slipping off.
The 3 external forces acting on Earth are gravity from the Sun and Moon, solar radiation pressure, and tidal forces from the Moon and Sun.
Yes, an object at rest can have forces acting on it. The vertical forces acting on an object at rest would include gravity pulling it downward and the normal force from a surface pushing it upward to balance the force of gravity.
As Felix Baumgartner jumped to earth during his space jump, the main forces acting on him were gravity pulling him downward and air resistance pushing against him as he fell through the atmosphere. These forces affected his speed and trajectory during the jump.
Yes, there are gravitational and normal forces acting on the book. The gravitational force acts downwards towards the center of the Earth, while the normal force acts perpendicular to the surface of the table and supports the weight of the book.
That's usually called the object's "weight". Like say if you're talking about the forces of gravity between you and the Earth, the force of gravity acting on you is your weight on the Earth, and the force of gravity acting on the Earth is the Earth's weight on you, and they're equal.
Free Fall
momentum i think