momentum conservation

2007-12-30 7:10 am

我想問點樣決定momentum有冇conserve?"
我唔係好明
thxz!

回答 (3)

2007-12-30 11:34 pm

✔ 最佳答案

用公式計算
momentum = m1v1 + m2v2
當相撞前同相撞後所產生ge動量 ( mv相加 )不一樣 momentum就冇conserve
原因係KE lost.
如果冇比數據你要consider過程到有冇KE lost.

👍 0 👎 0

2007-12-31 2:56 am

In a system,momentum must conserve
equation m1u1+m2u2=m1v1+m2v2 can always be used
energy may not conserve because there is an external force

👍 0 👎 0

2007-12-30 7:34 am

o係一個system入面冇external force

👍 0 👎 0