Watch this video to find out more about forces that can act on objects without touching them. Gravitational forces that make things fall down to the ground – unless another force stops them. An apple ...

Since antiquity scholars know that magnets attract iron. However, most ancient or medieval scholars were hardly interested in the matter of magnetic repulsion, and if so, repulsion was mostly related ...

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Why is electromagnetic repulsion so infrequently used in applications? As in, using an electromagnet to repel a permanent magnet, rather than to attract a magnet or ferrous material? I was doing some ...

lend itself to producing ultrasensitive detectors and almost friction-free devices by separating their components via Casimir repulsion. "Where you would normally have friction," he says, "you can ...

When two objects repel each other under the action of one force, we usually expect that addition of another force, also repulsive one, will accelerate separation. This intuitive view is, however, not ...