有冇師兄識mechanical reasoning?
我大佬要考消防,佢要考mechanical reasoning...
有條例,但係唔識,有冇師兄識解?
The objest was fixed on one end. If some fore is applied to lift the other end, which direction to apply with save energy most?
a. Direction A
b. Direction B
c. Direction C
d. All the same.
有冇師兄識點解?
THX...
萬分感謝...
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本帖最後由 sam524 於 12-6-2010 15:07 編輯 ]