[問題] 請教有關轉動的問題
恩雖然 轉動 是高中就有的課程，
但我高中時卻沒學過.....XD
現在普物又遇到了....
請問:
∣
∣
○==========○
∣ L
∣
∣
A rigid body consisting of two particles of mass m connected by a rod
of length L and negligible mass
What is the rotational inertia I of the body about an axis through the left
end ,perpendicular to the rod as shown?
答案如下:
1 1
I= —mL^2+(2m)(—L)^2
2 2
=mL^2
為什麼是這樣呢?我不懂這個式子，前面那項是怎麼來的??
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◆ From: 218.167.64.14
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※ 編輯: zumwohl 來自: 218.167.64.14 (11/01 22:00)
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