Pro@programming.dev to Technology@lemmy.worldEnglish · 3 months agoHonda successfully launched and landed its own reusable rocketglobal.hondaexternal-linkmessage-square137linkfedilinkarrow-up1504arrow-down11cross-posted to: [email protected]
arrow-up1503arrow-down1external-linkHonda successfully launched and landed its own reusable rocketglobal.hondaPro@programming.dev to Technology@lemmy.worldEnglish · 3 months agomessage-square137linkfedilinkcross-posted to: [email protected]
minus-squaregandalf_der_12te@discuss.tchncs.delinkfedilinkEnglisharrow-up1·edit-23 months agoYeah, if by “going over”, you mean accelerating in the horizontal direction, then you’re right. Just to illustrate this: Consider we want to put 1 kg of mass into orbit. First, we have to raise it by 100 km. That requires 1e6 J = 1 MJ of energy (formula is m*g*h). Then, we have to accelerate it sideways, to a speed of 8 km/s. The energy to do that is 32 MJ (formula is ½*m*v²). So, most of the energy (97%) is actually in the sideways movement.
Yeah, if by “going over”, you mean accelerating in the horizontal direction, then you’re right.
Just to illustrate this: Consider we want to put 1 kg of mass into orbit.
First, we have to raise it by 100 km. That requires 1e6 J = 1 MJ of energy (formula is m*g*h).
Then, we have to accelerate it sideways, to a speed of 8 km/s. The energy to do that is 32 MJ (formula is ½*m*v²).
So, most of the energy (97%) is actually in the sideways movement.