- #1
eosphorus
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"In physics, for a given gravitational field and a given position, the escape velocity is the minimum speed an object without propulsion, at that position, needs to have to move away indefinitely from the source of the field, as opposed to falling back or staying in an orbit within a bounded distance from the source. The object is assumed to be influenced by no forces except the gravitational field"
"On the surface of the Earth the escape velocity is about 11.2 kilometres per second. However, at 9000 km altitude in "space", it is slightly less than 7.1 km/s."
this is taken from the wikipedia: http://en.wikipedia.org/wiki/Escape_velocity
so if i have 1 kg mass at sea level at a speed of 11200 m/s according to physics the more altitude it can reach is 11200 m, conservation of energy,
so why this says that once reached the scape velocity it can go away indefinitly?
"On the surface of the Earth the escape velocity is about 11.2 kilometres per second. However, at 9000 km altitude in "space", it is slightly less than 7.1 km/s."
this is taken from the wikipedia: http://en.wikipedia.org/wiki/Escape_velocity
so if i have 1 kg mass at sea level at a speed of 11200 m/s according to physics the more altitude it can reach is 11200 m, conservation of energy,
so why this says that once reached the scape velocity it can go away indefinitly?