標題:
K.E=P.E=net work done?
發問:
K.E=P.E=net work done? Why?PLease explain 更新: In chinese
最佳解答:
K.E=P.E=net work done? Actually, it is increase in K.E.=Work Done or increase in P.E.=Work Done 以下有一段證明,如果你可以認真睇清楚,應該就會明. Increase in K.E. =0.5mv^2-0.5mu^2 =0.5m(v^2-u^2) (Note that v^2-u^2=2as) =0.5m(2as) =mas =Fs=W 所以話Increase in K.E.=Work done Increase in P.E. =mgh2-mgh1 =mg(h2-h1) =mg(displacement) =Ws =Fs=W 所以話Increase in P.E.=Work done,而呢個work done係地球比出黎.
K.E=P.E=net work done?
發問:
K.E=P.E=net work done? Why?PLease explain 更新: In chinese
最佳解答:
K.E=P.E=net work done? Actually, it is increase in K.E.=Work Done or increase in P.E.=Work Done 以下有一段證明,如果你可以認真睇清楚,應該就會明. Increase in K.E. =0.5mv^2-0.5mu^2 =0.5m(v^2-u^2) (Note that v^2-u^2=2as) =0.5m(2as) =mas =Fs=W 所以話Increase in K.E.=Work done Increase in P.E. =mgh2-mgh1 =mg(h2-h1) =mg(displacement) =Ws =Fs=W 所以話Increase in P.E.=Work done,而呢個work done係地球比出黎.
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