to escape from a planets gravity an object must reach a speed called the escape velocity.
to escape from a planets gravity an object must reach a speed called the?
escape velocity
at a specific horizontal firing speed called escape velocity, dependent on the mass of the planet, an open orbit (e) is achieved that has a parabolic path. at even greater speeds the object will follow a range of hyperbolic trajectories. in a practical sense, both of these trajectory types mean the object is "breaking free" of the planet's gravity, and "going off into space" never to return.





























the velocity relationship of two moving objects with mass can thus be considered in four practical classes, with subtypes:





























bullet::::1. "no orbit"





























bullet::::2. "suborbital trajectories"





























bullet::::- range of interrupted elliptical paths
orbit
bullet::::- day 3: tue, july 19: must reach broken arrow, oklahoma checkpoint.





























bullet::::- day 4: wed, july 20: must reach topeka, kansas checkpoint; must reach omaha, nebraska checkpoint.





























bullet::::- day 5: thu, july 21: must reach sioux falls, south dakota checkpoint.





























bullet::::- day 6: fri, july 22: must reach fargo, north dakota checkpoint.





























bullet::::- day 7: sat, july 23: finish in winnipeg, manitoba.





























bullet::::- day 8: sun, july 24: start in winnipeg, mb; must reach brandon, mb checkpoint.





























bullet::::- day 9: mon, july 25: must reach regina, saskatchewan checkpoint;





























bullet::::- day 10: tue, july 26: finish in medicine hat, alberta.
north american solar challenge 2005