3fb8c32fffd711ab6fb8d38a46c12c244d8731bdaa1eebbb921b73dee2e414f22370847ae3f425e440075b246060157062cae14f4551f10f3e

7fed8272b58a69f151ee83e541847673001a2018bbbe23a51a1552662fdc958f

ㅆㅂ 난제인데이거

시간 t0일때 평속이니까 속도가 똑같은거라고하고하면

질량비 9/5 나오는데

다르게구하면 5/4나옴 어케함