[๋Œ€ํ•™๋ฌผ๋ฆฌํ•™] ์ถ”์ง„๋ ฅ๊ณผ ๋กœ์ผ“์˜ ์ถ”์ง„

$Mdv=v_edm=-v_edM$

$\int^{v_f}_{v_i}dv=-v_e\int^{M_f}_{M_i}\frac{dM}{M}$

$v_f-v_i=v_e\ln\left(\frac{M_i}{M_f}\right)$

 

(์ถ”์ง„๋ ฅ)=$M\frac{dv}{dt}=\left|v_e\frac{dM}{dt}\right|$

M: ๊ณ„์˜ ์ „์ฒด ์งˆ๋Ÿ‰, $v_e$: ๋ฐฐ๊ธฐ ์†๋ ฅ

 

* ์œ„ ์‹๋“ค์€ ๋กœ์ผ“๋ฟ ์•„๋‹ˆ๋ผ ๋ฌผ์„ ๋ฐœ์‚ฌํ•˜๋Š” ์ƒํ™ฉ ๋“ฑ ์œ ์‚ฌํ•œ ์ƒํ™ฉ์—์„œ๋„ ์ ์šฉ์ด ๊ฐ€๋Šฅํ•˜๋‹ค.