Table of Contents
- 1 Why is gravity attractive force and not repulsive?
- 2 What force can be repulsive or attractive?
- 3 Why is force of gravity an attractive force?
- 4 Why gravitational force is always attractive force?
- 5 Why are repulsive forces positive?
- 6 Is gravitational between any two bodies always attractive or repulsive?
- 7 What is the meaning of F in GMm/r^2?
- 8 What is the value of gm1m2/r2?
- 9 Why does the attractive force have a negative sign?
Why is gravity attractive force and not repulsive?
In the case of gravity, mediated by spin 2 particles, charge is mass, which is always positive. Thus, q1q2 is always greater than zero, and gravity is always attractive. For spin 0 force mediators, however, there is no restriction on the charges and you can very well have repulsive forces.
What force can be repulsive or attractive?
Concept Connections: The Four Basic Forces
| Force | Approximate Relative Strengths | Attraction/Repulsion |
|---|---|---|
| Gravitational | 10−38 | attractive only |
| Electromagnetic | 10–2 | attractive and repulsive |
| Weak nuclear | 10–13 | attractive and repulsive |
| Strong nuclear | 1 | attractive and repulsive |
Is gravitational force attractive as well as repulsive?
We know that the gravitational force is defined as the multiplication of the gravitational constant along with the masses of the objects and then divided by the square of the distance between the objects. Hence, the nature of the gravitational force will always be attractive and not repulsive.
Why is force of gravity an attractive force?
Since the gravitational force is directly proportional to the mass of both interacting objects, more massive objects will attract each other with a greater gravitational force. So as the mass of either object increases, the force of gravitational attraction between them also increases.
Why gravitational force is always attractive force?
Gravitational force is always attractive based on the traditional understanding of matter, which has a positive mass.
How are attractive and repulsive forces distinguished when calculating forces?
The Coulomb force between two or more charged bodies is the force between them due to Coulomb’s law. If the particles are both positively or negatively charged, the force is repulsive; if they are of opposite charge, it is attractive.
Why are repulsive forces positive?
You would have learnt this thing in chemistry (In Atom Structure, you would have calculated energy of electrons for different energy levels b/w electron & proton(nucleus)), that attractive force reduces the energy of the electrons and repulsive force increases the energy of electrons) So since energy corresponding to …
Is gravitational between any two bodies always attractive or repulsive?
The gravitational force between two bodies is always attractive. The gravitational force is a force that attracts any two objects with mass.
Can gravitational force be repulsive like the electrostatic force?
Gravitational forces can also be repulsive like that of electrostatic forces. Electrostatic force is defined as an attractive or repulsive force between the two electrically charged objects; it is also known as the Coulomb force.
What is the meaning of F in GMm/r^2?
In F=GMm/r^2 (Gravitational Law), F represents the force between the two bodies..!! It means that Force between two bodies is equal and opposite to each other.
What is the value of gm1m2/r2?
Mathematically it can be represented as, F = Gm1m2/r2. Where, F is the Gravitational force between two objects measured in Newton (N). G is the Universal Gravitational Constant with a value of 6.674 × 10-11 Nm2kg-2. m1 is the mass of one massive body measured in kg.
What effect does attractive force have on separation?
It’s probably easiest to think in terms of what effect the attractive force can have on separation. It will reduce the separation if it’s allowed to (not sufficient other forces to cancel it out) – so the effect is negative on the separation. So if there is any difference will the object stay in the orbit or fall down?
Why does the attractive force have a negative sign?
The negative sign is the result of a sign convention. The force is a vector quantity, so the sign depends on the implied direction. In polar coordinates, “r” points outward from the origin. So if the direction is not explicitly stated, it is usually taken to be positive = out. Why do attractive force have a negative sign?