Anonymous
Anonymous asked in Science & MathematicsEngineering · 9 years ago

Correct axis choice for Rotation in Steam Engine?

Hi There. I have this steam engine below:

http://chestofbooks.com/crafts/popular-mechanics/T...

And I want to work out the kinetic energy in the Piston rod at different points. As the engine rotates it's centre of mass clearly moves back and forth and up and down.

However, the rod is also rotating.

My question is, should I treat this rotation as being about the center of the rod, or about the point where it connects with the piston (G).

Thanks!

1 Answer

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  • Jacko
    Lv 6
    9 years ago
    Favorite Answer

    If you are only concerned with the rod, then you must take the rotation as being about the C.of G. of the rod.

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