Don_Dickle@lemmy.world to Ask Science@lemmy.worldEnglish · edit-21 month agoDon't know if putting this right. But how much forcer is needed to break gravity? Like how much does the space shuttle require to get past earth gravity and use the moons gravity to get further??message-squaremessage-square14linkfedilinkarrow-up136arrow-down15file-text
arrow-up131arrow-down1message-squareDon't know if putting this right. But how much forcer is needed to break gravity? Like how much does the space shuttle require to get past earth gravity and use the moons gravity to get further??Don_Dickle@lemmy.world to Ask Science@lemmy.worldEnglish · edit-21 month agomessage-square14linkfedilinkfile-text
minus-squareBlue_Morpho@lemmy.worldlinkfedilinkEnglisharrow-up2arrow-down4·1 month agoYou need to move at a speed of 4km/s.
minus-squareooterness@lemmy.worldlinkfedilinkEnglisharrow-up10·1 month agoRight idea, wrong number. Satellites in low Earth orbit are typically moving at about 7-8 km/s, depending on the exact altitude. The speed required to get from the surface to deep space (i.e., the “escape velocity”) is 11.2 km/s.
minus-squareDon_Dickle@lemmy.worldOPlinkfedilinkEnglisharrow-up1·1 month agoAnother question. You always hear and see jets break the sound barrier but when they put their “boost” is there a point where they can’t break the speed barrier traveling upwards? Or can you only break sound barrier within the confines of the earth.
minus-squareBlue_Morpho@lemmy.worldlinkfedilinkEnglisharrow-up1·1 month agoSpeed of sound changes with altitude https://en.wikipedia.org/wiki/Speed_of_sound
You need to move at a speed of 4km/s.
Right idea, wrong number. Satellites in low Earth orbit are typically moving at about 7-8 km/s, depending on the exact altitude. The speed required to get from the surface to deep space (i.e., the “escape velocity”) is 11.2 km/s.
Another question. You always hear and see jets break the sound barrier but when they put their “boost” is there a point where they can’t break the speed barrier traveling upwards? Or can you only break sound barrier within the confines of the earth.
Speed of sound changes with altitude
https://en.wikipedia.org/wiki/Speed_of_sound