Bài 17:

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Bài 17:. Xác định momen quán tính chính trung tâm: Ta tìm tọa độ chính trung tâm:xc,yc Chọn tọa đọ cho hình 1,ta có:xc=0,tính yc theo công thức:. Vậy momen quán tính chính trung tâm:J X = ,J Y = ,J XY =0.

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Mar 18, 2014

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Bài 17:

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Bài 17: Xác định momen quán tính chính trung tâm: Ta tìm tọa độ chính trung tâm:xc,yc Chọn tọa đọ cho hình 1,ta có:xc=0,tính yc theo công thức:
Vậymomenquántínhchínhtrungtâm:JX=,JY=,JXY=0

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