gravity
Q. What are three examples of forces that act at a distance?
Magnetism, and electrical charge, and gravitation are examples of forces that act at a distance.
Table of Contents
- Q. What are three examples of forces that act at a distance?
- Q. What force acts from a distance?
- Q. How does a non-contact force act?
- Q. What are two examples of action-at-a-distance forces?
- Q. What are different types of forces?
- Q. What is the difference between contact and action at a distance force?
- Q. Who said spooky action at a distance?
- Q. What is the problem with action at a distance?
- Q. Is force dependent on distance?
- Q. Is electricity a non-contact force?
- Q. Can gravitational force act from a distance?
- Q. Does gravity have a distance limit?
- Q. Why is gravity not a law?
Q. What force acts from a distance?
Gravitational forces
Q. How does a non-contact force act?
A non-contact force is a force which acts on an object without coming physically in contact with it. The force exerted on each body by the other through weight is proportional to the mass of the first body times the mass of the second body divided by the square of the distance between them. …
Q. What are two examples of action-at-a-distance forces?
Examples of contact and action-at-distance forces are listed in the table below….Contact versus Action-at-a-Distance Forces.
| Contact Forces | Action-at-a-Distance Forces |
|---|---|
| Frictional Force | Gravitational Force |
| Tension Force | Electrical Force |
| Normal Force | Magnetic Force |
| Air Resistance Force |
Q. What are different types of forces?
Types of Forces
| Contact Forces | Action-at-a-Distance Forces |
|---|---|
| Frictional Force | Gravitational Force |
| Tension Force | Electrical Force |
| Normal Force | Magnetic Force |
| Air Resistance Force |
Q. What is the difference between contact and action at a distance force?
The difference between contact force and an action-at-a-distance force is that action at a distance force act on objects without touching them and contact forces have only an effect when they touch on object.
Q. Who said spooky action at a distance?
Albert Einstein
Q. What is the problem with action at a distance?
The problem is this: action at a distance means that one object is able to influence another instantaneously, but in relativity this idea doesn’t really make sense, as I will now explain.
Q. Is force dependent on distance?
When dealing with the force of gravity between two objects, there are only two things that are important – mass, and distance. The force of gravity depends directly upon the masses of the two objects, and inversely on the square of the distance between them. However, the exponent on the mass terms is one.
Q. Is electricity a non-contact force?
Attraction and repulsion of electric charges is one of three fundamental non-contact forces in nature. The others are magnetism and the force of gravity (see the focus idea Forces without contact).
Q. Can gravitational force act from a distance?
Gravitational force acts at a distance – i.e. the objects do not need to touch each other. We can regard them as interacting with the gravitational field of the other: think of this existing in the space around an object, so another object in this space feels a force towards it.
Q. Does gravity have a distance limit?
No. The attractive force called gravity does not extend beyond galaxy groups. As you get farther away from a gravitational body such as the sun or the earth (i.e. as your distance r increases), its gravitational effect on you weakens but never goes completely away; at least according to Newton’s law of gravity.
Q. Why is gravity not a law?
This is a law because it describes the force but makes not attempt to explain how the force works. A theory is an explanation of a natural phenomenon. Einstein’s General Theory of Relativity explains how gravity works by describing gravity as the effect of curvature of four dimensional spacetime.
