There are numerous attractive forces prevailing in nature. Some of them are magnetic force, electric force, electrostatic force and gravitational force. Gravitational force is very well-identified instance force of attraction as it draws objects towards itself regardless of its distance.

According to some calculations, the Earth is losing 50,000 metric tons of mass every single year, even though an extra 40,000 metric tons of space dust converge onto the Earth’s gravity well, it’s still losing weight.

Why is gravity only an attractive force? Because mass is always positive. There are different notions of mass, but they’re equivalent. The masses in Newton’s law of gravitation, F=Gm1m2r2, are gravitational masses.

It is shown that reduction of the gravitational mass of the system due to emitting gravitational waves leads to a repulsive gravitational force that diminishes with time but never disappears. This repulsive force may be related to the observed expansion of the Universe.

1 : serving or able to repulse repulsive force. 2 : tending to repel or reject : cold, forbidding. 3 : arousing aversion or disgust repulsive crimes.

Attraction is a force between two charges that are distinct or unlike. Because the nuclei are positive and the electrons are negative, the electrons are attracted to the nuclei. Repulsive forces occur only when atoms are very close to each other.

If both the interacting particles are positively or negatively charged, then the force is repulsive. If both the interacting particles are of opposite charges then the force is attractive in nature. Coulomb’s law describes this nature of electric charges.

Repulsive forces Repulsive forces exist only when atoms are very close to each other. (3/14) “They [the atoms] will approach until both nuclei will simply shove each other because both of them are positive.” The balance between the attraction and repulsion forces determines how close the atoms can get.

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 …

If the particles are both positively or negatively charged, the force is repulsive; if they are of opposite charge, it is attractive. This called Coulomb’s law and was the first attempt to understand the electric force. Like the gravitational force, the Coulomb force is an inverse square law.

Answers and Replies So a repulsive force is in the positive r direction and an attractive force is in the negative r direction .

Forces can be positive or negative. And forces which are aimed to the left are usually said to be in a negative direction. So, to be more accurate, in the above diagram we should call F1 a negative force, that is, negative 20 Newtons, and we should call F2 a positive force, or positive 18 Newtons.

It can negative. it means that the force is going to the opposite direction. A ‘negative’ force is one that is acting in the direction opposite to what you decide to be the positive direction (Usually, upward is +ve, downward is -ve). If the object is accelerating, then the situation is different.

Weight is a vector quantity so it can be either positive or negative, with respect to reference it can be positive or negative.

If you mean can the magnitude (the size) of a force be negative then the answer is no. There is no meaning to the idea of a force value less than zero force. HOWEVER: Force is a vector. If you define a positive DIRECTION for force then a negative force is simply in the opposite direction.