<P> Orbital spaceflight from Earth has only been achieved by launch vehicles that use rocket engines for propulsion . To reach orbit , the rocket must impart to the payload a delta - v of about 9.3 -- 10 km / s . This figure is mainly ( ~ 7.8 km / s ) for horizontal acceleration needed to reach orbital speed , but allows for atmospheric drag ( approximately 300 m / s with the ballistic coefficient of a 20 m long dense fueled vehicle ) , gravity losses ( depending on burn time and details of the trajectory and launch vehicle ) , and gaining altitude . </P>
<P> Orbital spaceflight from Earth has only been achieved by launch vehicles that use rocket engines for propulsion . To reach orbit , the rocket must impart to the payload a delta - v of about 9.3 -- 10 km / s . This figure is mainly ( ~ 7.8 km / s ) for horizontal acceleration needed to reach orbital speed , but allows for atmospheric drag ( approximately 300 m / s with the ballistic coefficient of a 20 m long dense fueled vehicle ) , gravity losses ( depending on burn time and details of the trajectory and launch vehicle ) , and gaining altitude . </P>
speed a rocket has to be accelerated to in order to launch a satellite into orbit of the earth
speed a rocket has to be accelerated to in order to launch a satellite into orbit of the earth
the rocket must impart to the payload a delta - v of about 9.3 -- 10 km / s
the rocket must impart to the payload a delta - v of about 9.3 -- 10 km / s