Ideally, once in orbit, a satellite remains the same altitude and angular velocity forever. There are two common ways in which a satellite can slow down.
Atmospheric Drag
Low earth orbit (LEO) satellites - below 2,000 Km (1,200 mile) altitude - suffer orbital decay due to atmospheric drag, especially below 500 Km altitude. While extremely thin, the atmosphere is still present at such altitudes, and as a result, such low earth orbit satellites lose some of their orbital kinetic energy (speed) to friction with the thin atmosphere, called drag.
The International Space Station (ISS), for example, is a LEO satellite, orbiting the earth at an altitude of approximately 330 Km (210 miles). At this altitude, the ISS encounters a tiny amount of atmospheric drag, and as a result, it slows down infinitesimally in each orbit. The tiny orbital decay accumulates orbit after orbit, and after a long while, the ISS will have slowed down noticeably. Kepler's law of orbital dynamics tell us that, as an orbiting object slows down, it cannot sustain its existing orbit, and without an external force to push the object into a higher orbit, the object will also lose altitude. So not only does the ISS slow down, but it ever so gradually descends toward earth as well. As it loses altitude, the ISS encounters slightly thicker atmosphere, creating an even stronger drag, causing the ISS to slow down even faster, and lose altitude more quickly, and thus a vicious cycle begins.
The visiting space shuttles periodically use their rocket thrusters to boost the ISS back up to its optimal orbit and speed. Without these regular repositioning missions, the ISS is doomed to a fiery re-entry and plummet to the earth's surface.
Tidal Dynamics
Tidal Dynamics occur when a secondary body orbits a primary body, and the primary body has oceans that give rise to tides due to the secondary body's gravitational pull.
Consider the Earth (primary body) and the moon (secondary body). The moon orbits the Earth, and as it does, it causes tides to bulge in the Earth's oceans. The angular gravitational torque between the moon and this tidal bulge acts as an external force upon the moon, thus causing the moon to ascend in its orbit, and in accordance with Kepler's law, the velocity of the moon decreases at the higher orbit.
Therefore the moon is imperceptibly slowing down every year due to tidal forces. At the same time, tidal friction here on Earth is causing our planet to reduce the speed of its rotation ever so slightly. These changes in the moon's orbit and Earth's rotation are so infinitesimally small that they almost go unnoticed - almost. The slowing of the Earth's orbit due to tidal friction does give rise to the odd leap second from time to time.
In theory, this phenomenon will continue for about 2 billion years until the earth's rotation and moon's orbit were in perfect lock, and the moon would forevermore hover over the exact same point on Earth. This tidal-locked geosynchronous orbit already exists with Pluto and its moon, Charon. In the case of Earth, there is a good chance our sun will have expanded to such a size and intensity that that the oceans, and all living things on Earth, will have been vaporized long before the moon locks over a single position above Earth.
Silicon, with an index of 3.96, is the lowest I could find.
When the wind starts to slow down it starts to deposit sand or other sediment.
Slow Down, Slow, retared
The satellite is being pulled by the earths gravity all of the time, but the satellite also has an orbital velocity, meaning that is is travelling at high speed. These two opposing forces balance out, the 'sideways' speed of the satellite wants to take it away into space, but the gravity of the earth is always pulling it in. The satellite maintains its speed as there there are no frictional forces to slow it down in space, so it maintains an orbit.
The most likely factor that would cause a communications satellite orbiting Earth to return to Earth from its orbit would be atmospheric drag. As the satellite moves through the Earth's atmosphere, it experiences friction with air molecules which can slow it down and cause its orbit to decay, eventually leading to re-entry into Earth's atmosphere.
A parachute... •_•
Competition for resources
yes
The weight of the objects or due to the force
False. Why would it slow down? There is no friction in a high orbit; a satellite can orbit indefinitely. Only in low orbits will satellites slow down and fall from orbit, and the cause is the friction of the extremely tenuous final traces of Earth's atmosphere.
Friction is the force that causes things to slow down due to contact. When two surfaces rub against each other, friction generates resistance that opposes the motion, ultimately causing the objects to slow down.
the brakes or the emrgen see brakes
Air resistance.
friction
concervation of momentum concervation of momentum 2nd Answer: Well, not really, no. Friction causes moving objects to slow.
Friction causes the bike to slow down.
time of the season