Friction is a force that opposes motion. When two objects are in contact, friction is acts in a direction opposite to the motion of the object.

Answer: From the relationship, (i) If the mass of one object (say body 1) is doubled, then Thus, the gravitational force between the two objects gets doubled. (ii) If the distance between the two objects is doubled, then Thus, the gravitational force between the two objects becomes one-fourth.

According to the law of gravitation, the force of attraction acting between two bodies is given by, Thus, when the distance between the objects is reduced to half the gravitational force increases by four times the original force.

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.

Both in the Newton theory of gravitation and in the General Theory of Relativity the gravitational force is exclusively attractive one. However, the quantization of gravity shows that the gravitational forces can also be repulsive [3].

Aside from the long-running Anti Gravity column in Scientific American, however, there is no such thing as antigravity. Gravity is a force arising among any two masses in the universe. As of yet, no technology exists to neutralize the pull of gravity.

Unlike the Force, with its dark and light sides, gravity has no duality; it only attracts, never repels. 3.

The leading theory to explain the accelerating expansion is the existence of a hypothetical repulsive force called dark energy. “We are replacing an unknown force caused by an unknown element with the repulsive gravity of the well-known antimatter.” (Related: “Dark Matter Is an Illusion, New Antigravity Theory Says.”)

Now, we come to gravitational waves. These are sort of unique, because we’ve only seen the wave-like part of them, never the particle-based part. However, just like water waves are waves that are made of particles, we fully expect that gravitational waves are made of particles, too.

Thomas Townsend Brown

We do know HOW mass attracts mass. Force = (G x M x M) / (distance x distance). To increase gravity, increase either object’s mass OR decrease the distance between the objects. If you want to be more attracted (by Gravity) to your 100 pound sweetheart, increase her mass with food or clothing OR squeeze closer to her.

But, while this discovery may be ancient, a team of French physicists has now discovered a new kind of buoyancy that they call “anti-gravity.” In both theoretical and experimental trials, the researchers found that objects, such as small toy boats, could float on the opposite side of levitated fluids instead of falling …

Reverse waterfall, Faroe Islands Well, there is one on the Faroe Islands, where the water seems to move upward, i.e., defying the law of gravity. In fact, the waterfall, rather than defying gravity as the name suggests, goes upside down when strong gusts of wind blows against the flow of the waterfall.

Mount Nevado Huascarán

Sri Lanka

Less mass means less gravity. The Laurentide Ice Sheet hasn’t quite melted all the way. The Barnes Ice Cap, in the middle of Baffin Island in northern Canada, is all that remains of a sheet that once covered hundreds of thousands of square miles.