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Parallel Axis Theorem-Applied Maths

blacklionboy · 2010-05-03 20:47:24

Hi there, Im having trouble understanding one small part of the parallel axis theorem. It's to do with the distance between each tiny part of mass and the new axis. (r=distance from a tiny of part mass to axis running through COG) (D= The distance between the axes) The book says: "Take a piece of mass Delta M and let 'r'…

03-05-2010 8:47pm

#1

blacklionboy

Registered Users, Registered Users 2 Posts: 100 ✭✭

Join Date: January 2008

Posts: 63

Hi there,

Im having trouble understanding one small part of the parallel axis theorem.

It's to do with the distance between each tiny part of mass and the new axis.

(r=distance from a tiny of part mass to axis running through COG)
(D= The distance between the axes)

The book says:
"Take a piece of mass Delta M and let 'r' be its distance from the axis C(running through COG). (r-d) is therefore it's distance from the new axis"

This is the part I don't understand. How is (r-d) the distance from the deltaM to the new axis? Been stuck on it for a while

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