mechanics

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yau

2008-11-12 11:41 pm

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help me part a and b!!

更新1:

b part how to do?? K.E loss to A = =1/2mu^2-1/2m(u-MV/m)^2 there exists V 用m和M表示only

回答 (1)

Chau

2008-11-14 5:59 am

✔ 最佳答案

a)mu=mv+MV,1/2mu^2=1/2mv^2+1/2MV^2
b)mu=mv+MV
v=(mu-MV)m
v=u-MV/m
K.Eloss to A=1/2mu^2-1/2mv^2
=1/2mu^2-1/2m(u-MV/m)^2

2008-11-15 21:31:43 補充：
Actually,the question didn't ask you for only m and M.As a result,the answer contain m and M is ok.

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