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¸·´ëÀÇ ±æÀÌ°¡ L (m) ÀÏ ¶§, ÇÑ ÂÊ ³¡¿¡ Áú·® m (kg) ÀÎ ¹°Ã¼¸¦ ´Þ¾Ò´õ´Ï Áß½ÉÁ¡ÀÌ ¹°Ã¼ÂÊÀ¸·Î d (m) ¸¸Å­ À̵¿ÇßÀ» ¶§, ¸·´ëÀÇ Áú·® ms (kg) À» ±¸ÇÑ´Ù.

d Á¡¿¡¼­ ¸ð¸àÆ® ÆòÇüÀ» ÀÌ·ç°í ÀÖÀ¸¹Ç·Î, ´ÙÀ½½ÄÀÌ ¼º¸³ÇÑ´Ù.

(ms/L)(L/2+d)g(L/2+d)/2 = (ms/L)(L/2-d)g(L/2-d)/2 + mg*(L/2-d)

À̸¦ Á¤¸®Çϸé,

(ms/L)(L/2+d)^2 = (ms/L)(L/2-d)^2 + 2m(L/2-d)

ms(L/2+d)^2 = ms(L/2-d)^2 + 2mL(L/2-d)

ms((L/2+d)^2-(L/2-d)^2) = 2mL(L/2-d)

ms(2Ld) = 2mL(L/2-d)

ms = mL(L/2-d)/(Ld) = mL(L-2d)/(2Ld)

ÀÌ µÈ´Ù.

*** Âü°í¹®Çå[References] ***

ms = m*L*(L-2*d)/(2*L*d)
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