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What causes an electric current to keep moving is a steady supply of electrons.
Gravity holds an object in a circular orbit.
Yes. It keeps the planets in orbit around the Sun.
There is not a lot of gravity in space, but there is enought to keep the planets in orbit around the Sun.
The force of gravity is a mixed blessing. Although we depend on it to keep us in our beds at night, to keep the atmosphere down on Earth where we need it, to keep the Earth in its orbit around the sun, and to keep our food on the plate, it also comes with the inescapable hazard of falling down and hurting one'self, against which one must be ever vigilant and on his or her guard.
The electrostatic forces between the protons and the electrons keep it in orbit.
What causes an electric current to keep moving is a steady supply of electrons.
What causes an electric current to keep moving is a steady supply of electrons.
centripetal force
No force is necessary to keep a moving object in motion. But if you want it tofollow a curve, such as for example a closed orbit, then that takes force. Theforce that keeps Neptune in its closed orbit is the same force that keeps everyplanet, moon, comet, and asteroid in its own closed orbit around its own centralbody. It's the force of gravity.
it uses its force to make the planets orbit the sun.
Which 2 are they -Magnetic force between the sun and earth -Electric force between the sun and earth -Planets spontaneously travel in elliptical paths -The sun's gravity and inertia
the wave front of electric current. the electrons themselves move much slower but they keep pushing electrons ahead of them on resulting in a wavefront that moves at almost the speed of light.
orbit
gravity and force
The mutual gravitational attraction between the earth and the sun is the force that keeps the earth in orbit around the sun. It's the only force required, which is lucky, because it's the only force that exists.
Voltage is the pressure that moves the electrons (current) through a circuit.